Loading earlier words…
Planish

To make smooth or plane, as a metallic surface; to condense, toughen, and polish by light blows with a hammer.

Planisphere

The representation of the circles of the sphere upon a plane; especially, a representation of the celestial sphere upon a plane with adjustable circles, or other appendages, for showing the position of the heavens, the time of rising and setting of stars, etc., for any given date or hour.

Plank

To cover or lay with planks; as, to plank a floor or a ship.

Plank-sheer

The course of plank laid horizontally over the timberheads of a vessel's frame.

Planking

The act of laying planks; also, planks, collectively; a series of planks in place, as the wooden covering of the frame of a vessel.

Plankton

All the animals and plants, taken collectively, which live at or near the surface of salt or fresh waters.

Plano- Plani-

Combining forms signifying flat, level, plane; as planifolious, planimetry, plano-concave.

Plano-concave

Plane or flat on one side, and concave on the other; as, a plano-concave lens. See Lens.

Plano-conical

Plane or flat on one side, and conical on the other.

Plano-convex

Plane or flat on one side, and convex on the other; as, a plano-convex lens. See Convex, and Lens.

Planoblast

Any free-swimming gonophore of a hydroid; a hydroid medusa.

Planogamete

One of the motile ciliated gametes, or zoogametes, found in isogamous plants, as many green alg/ (Chlorophyce/).

Planometer

An instrument for gauging or testing a plane surface. See Surface gauge, under Surface.

Planometry

The art or process of producing or gauging a plane surface.

Planorbis

Any fresh-water air-breathing mollusk belonging to Planorbis and other allied genera, having shells of a discoidal form.

Plant

To perform the act of planting.

Plant-cane

A stalk or shoot of sugar cane of the first growth from the cutting. The growth of the second and following years is of inferior quality, and is called rattoon.

Plant-eating

Eating, or subsisting on, plants; as, a plant-eating beetle.

Plantable

Capable of being planted; fit to be planted.

Plantage

A word used once by Shakespeare to designate plants in general, or anything that is planted.

Plantain

Any plant of the genus Plantago, but especially the Plantago major, a low herb with broad spreading radical leaves, and slender spikes of minute flowers. It is a native of Europe, but now found near the abode of civilized man in nearly all parts of the world.

Plantal

Belonging to plants; as, plantal life.

Plantar

Of or pertaining to the sole of the foot; as, the plantar arteries.

Plantation

The act or practice of planting, or setting in the earth for growth.

Planted

Fixed in place, as a projecting member wrought on a separate piece of stuff; as, a planted molding.

Planter

One who, or that which, plants or sows; as, a planterof corn; a machine planter.

Plantership

The occupation or position of a planter, or the management of a plantation, as in the United States or the West Indies.

Plantigrada

A subdivision of Carnivora having plantigrade feet. It includes the bears, raccoons, and allied species.

Plantigrade

A plantigrade animal, or one that walks or steps on the sole of the foot, as man, and the bears.

Planting

The act or operation of setting in the ground for propagation, as seeds, trees, shrubs, etc.; the forming of plantations, as of trees; the carrying on of plantations, as of sugar, coffee, etc.

Plantless

Without plants; barren of vegetation.

Plantocracy

Government by planters; planters, collectively.

Plantule

The embryo which has begun its development in the act of germination.

Planula

In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with gastrula.

Planxty

An Irish or Welsh melody for the harp, sometimes of a mournful character.

Plaque

Any flat, thin piece of metal, clay, ivory, or the like, used for ornament, or for painting pictures upon, as a slab, plate, dish, or the like, hung upon a wall; also, a smaller decoration worn on the person, as a brooch.

Plaquette

A small plaque, esp., in modern medal engraving, a small and delicate bas-relief, whether cast or struck from a die, or of form other than circular.

Plash

The branch of a tree partly cut or bent, and bound to, or intertwined with, other branches.

Plashet

A small pond or pool; a puddle.

Plashing

The cutting or bending and intertwining the branches of small trees, as in hedges.

Plashoot

A hedge or fence formed of branches of trees interlaced, or plashed.

Plashy

Watery; abounding with puddles; splashy.

Plasm

A mold or matrix in which anything is cast or formed to a particular shape.

Plasma

A variety of quartz, of a color between grass green and leek green, which is found associated with common chalcedony. It was much esteemed by the ancients for making engraved ornaments.

Plasmic

Of, pertaining to, or connected with, plasma; plasmatic.

Plasmid

A piece of DNA, usually circular, functioning as part of the genetic material of a cell, not integrated with the chromosome and replicating independently of the chromosome, but transferred, like the chromosome, to subsequent generations of daughter cells. In bacteria, plasmids often carry the genes for antibiotic resistance; they are exploited in genetic engineering as the vehicles for introduction of extraneous DNA into cells, to alter the genetic makeup of the cell. The cells thus altered may produce desirable proteins which are extracted and used; in the case of genetically altered plant cells, the altered cells may grow into complete plants with changed properties, as for example, increased resistance to disease.

Plasmin

A proteid body, separated by some physiologists from blood plasma. It is probably identical with fibrinogen.

Plasmodial

Of or pertaining to, or like, a plasmodium; as, the plasmodial form of a life cycle.

Plasmodium

A jellylike mass of free protoplasm, without any union of am/boid cells, and endowed with life and power of motion.

Plasmogen

The important living portion of protoplasm, considered a chemical substance of the highest elaboration. Germ plasm and idioplasm are forms of plasmogen.

Plasmon butter Plasmon

A flourlike food preparation made from skim milk, and consisting essentially of the unaltered proteid of milk. It is also used in making biscuits and crackers, for mixing with cocoa, etc. A mixture of this with butter, water, and salt is called Plasmon butter, and resembles clotted cream in appearance.

Plasson

The albuminous material composing the body of a cytode.

Plaster

To cover with a plaster, as a wound or sore.

Plasterwork

Plastering used to finish architectural constructions, exterior or interior, especially that used for the lining of rooms. Ordinarly, mortar is used for the greater part of the work, and pure plaster of Paris for the moldings and ornaments.

Plastic

Having the power to give form or fashion to a mass of matter; as, the plastic hand of the Creator.

plastic

A substance composed predominantly of a synthetic organic high polymer capable of being cast or molded; many varieties of plastic are used to produce articles of commerce (after 1900). [MW10 gives origin of word as 1905]

Plastide Plastid

A formative particle of albuminous matter; a monad; a cytode. See the Note under Morphon.

Plastidule

One of the small particles or organic molecules of protoplasm.

Plastin

A substance associated with nuclein in cell nuclei, and by some considered as the fundamental substance of the nucleus.

Plastography

The art of forming figures in any plastic material.

Plastron

A piece of leather stuffed or padded, worn by fencers to protect the breast.

Plat

The flat or broad side of a sword.

Platanus

A genus of trees; the plane tree.

Platband

A border of flowers in a garden, along a wall or a parterre; hence, a border.

Plate

To cover or overlay with gold, silver, or other metals, either by a mechanical process, as hammering, or by a chemical process, as electrotyping.

plate tectonics

A geological theory which holds that the crust of the earth (the lithosphere) is divided into a small number of large separate plates which float and move slowly around on the more plastic asthenosphere, breaking apart and moving away from each other at points where magma upwells from below, and, driven by such upwellings and other currents on the athenosphere, sliding past each other, colliding with each other, and in some cases being submerged (subducted) one below the other. This theory is now widely accepted, and explains many geological phenomena such as the clustered locations of earthquakes, mountain building, volcanism, and the similarities observed between the geology of continents, such as South America and Africa which are now far apart, but, according to the theory, were once joined together. The motions of such tectonic plates are very slow, typically only several centimeters per year, but over tens and hundreds of millions of years, cause very large changes in the relative positions of the continents. The consequence of such movement of plates is called continental drift.

Plate-gilled

Having flat, or leaflike, gills, as the bivalve mollusks.

Plateau

A flat surface; especially, a broad, level, elevated area of land; a table-land.

Plateful

Enough to fill a plate; as much as a plate will hold.

Platen

The part of a printing press which presses the paper against the type and by which the impression is made. Hence, an analogous part of a typewriter, on which the paper rests to receive an impression. The movable table of a machine tool, as a planer, on which the work is fastened, and presented to the action of the tool; -- also called table.

Plater

A horse that runs chiefly in plate, esp. selling-plate, races; hence, an inferior race horse.

Plateresque

Resembling silver plate; -- said of certain architectural ornaments.

Plating

The art or process of covering anything with a plate or plates, or with metal, particularly of overlaying a base or dull metal with a thin plate of precious or bright metal, as by mechanical means or by electro-magnetic deposition.

Platinic

Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a higher valence, as contrasted with the platinous compounds; as, platinic chloride (PtCl4).

Platinichloric

Of, pertaining to, or designating, an acid consisting of platinic chloride and hydrochloric acid, and obtained as a brownish red crystalline substance, called platinichloric, or chloroplatinic, acid.

Platiniridium

A natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum.

Platinochloric

Pertaining to, derived from, or designating, an acid consisting of platinous chloride and hydrochloric acid, called platinochloric acid, or chloroplatinous, acid.

Platinochloride

A double chloride of platinum and some other metal or radical; a salt of platinochloric acid.

Platinocyanic

Pertaining to, derived from, or designating, an acid compound of platinous cyanide and hydrocyanic acid. It is obtained as a cinnaber-red crystalline substance.

Platinocyanide

A double cyanide of platinum and some other metal or radical; a salt of platinocyanic acid.

Platinoid

An alloy of German silver containing tungsten; -- used for forming electrical resistance coils and standards.

Platinotype

A permanent photographic picture or print in platinum black.

Platinous

Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a lower valence, as contrasted with the platinic compounds; as, platinous chloride (PtCl2).

Platinum

A metallic element of atomic number 78, one of the noble metals, classed with silver and gold as a precious metal, occurring native or alloyed with other metals and also as the platinum arsenide (sperrylite). It is a heavy tin-white metal which is ductile and malleable, but very infusible (melting point 1772/ C), and characterized by its resistance to strong chemical reagents. It is used for crucibles in laboratory operations, as a catalyst, in jewelry, for stills for sulphuric acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 195.1. Symbol Pt. Formerly called platina.

Platitude

The quality or state of being flat, thin, or insipid; flat commonness; triteness; staleness of ideas of language.

Platitudinarian

One addicted to uttering platitudes, or stale and insipid truisms.

Loading more words…