Enduring through a long time; chronic.

A clinic in which diseases of many sorts are treated; especially, an institution in which clinical instruction is given in all kinds of disease.

Pertaining to, or based upon, many cones.

Representing multiple possible worlds; -- used of a computational ontology that includes logically inconsistent assertions (theories), structured as different possible worlds; as, the only way to accommodate different theories of physics in one ontology is for that ontology to be polycosmic.

A plant that has many, or more than two, cotyledons in the seed.

Having the villi of the placenta collected into definite patches, or cotyledons.

Government by many rulers; polyarchy.

Of or pertaining to polycrotism; manifesting polycrotism; as, a polycrotic pulse; a polycrotic pulse curve.

That state or condition of the pulse in which the pulse curve, or sphygmogram, shows several secondary crests or elevations; -- contrasted with monocrotism and dicrotism.

One of the Polycystidea. One of the Polycystina. Pertaining to the Polycystidea, or the Polycystina.

A division of Gregarin/ including those that have two or more internal divisions of the body.

A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form and sculpture. Many have been found in the fossil state.

Pertaining to the Polycystina. One of the Polycystina.

A division of Radiolaria. It includes those having one more central capsules.

The possession of more that the normal number of digits.

Excessive and constant thirst occasioned by disease.

See Polyhedron.

See Polyhedral.

Passing through several distinct larval forms; -- having several distinct kinds of young.

The quality or state of being polyeidic.

Consisting of, or having, several embryos; polyembryonic.

Polyembryonate.

The production of two or more embryos in one seed, due either to the existence and fertilization of more than one embryonic sac or to the origination of embryos outside of the embryonic sac.

Same as Multifoil.

A genus of bitter herbs or shrubs having eight stamens and a two-celled ovary (as the Seneca snakeroot, the flowering wintergreen, etc.); milkwort.

Of or pertaining to a natural order of plants (Polygalace/) of which Polygala is the type.

Of, pertaining to, or obtained from, Polygala; specifically, designating an acrid glucoside (called polygalic acid, senegin, etc.), resembling, or possibly identical with, saponin.

A Linn/an class of plants, characterized by having both hermaphrodite and unisexual flowers on the same plant. A name given by Linn/us to file orders of plants having syngenesious flowers.

Polygamous.

One who practices polygamy, or maintains its lawfulness.

To practice polygamy; to marry several wives.

The having of a plurality of wives or husbands at the same time; usually, the marriage of a man to more than one woman, or the practice of having several wives, at the same time; -- opposed to monogamy; as, the nations of the East practiced polygamy. See the Note under Bigamy, and cf. Polyandry.

One of the Polygastrica.

One of the Polygastrica.

The Infusoria.

Having many distinct sources; originating at various places or times.

Of or relating to polygeny; polygenetic.

The doctrine that animals of the same species have sprung from more than one original pair.

One who maintains that animals of the same species have sprung from more than one original pair; -- opposed to monogenist.

Consisting of, or containing, many kinds; as, a polygenous mountain.

The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; -- opposed to monogenesis.

One who speaks several languages.

Speaking many languages; polyglot.

A plane figure having many angles, and consequently many sides; esp., one whose perimeter consists of more than four sides; any figure having many angles.

Of or pertaining to a natural order of apetalous plants (Polygonace/), of which the knotweeds (species of Polygonum) are the type, and which includes also the docks (Rumex), the buckwheat, rhubarb, sea grape (Coccoloba), and several other genera.

Having many angles.

Having two or more broods in a season.

The doctrine of polygons; an extension of some of the principles of trigonometry to the case of polygons.

Polygonal.

A genus of plants embracing a large number of species, including bistort, knotweed, smartweed, etc.

Any plant of the genus Polygonum.

A genus of marine annelids, believed to be an ancient or ancestral type. It is remarkable for its simplicity of structure and want of parapodia. It is the type of the order Archiannelida, or Gymnotoma. See Loeven's larva.

A figure consisting of many lines.

An instrument for multiplying copies of a writing; a manifold writer; a copying machine.

Pertaining to, or employed in, polygraphy; as, a polygraphic instrument.

Much writing; writing of many books.

Having many grooves; as, a polygrooved rifle or gun (referring to the rifling).

A plant of the order Polygynia.

A Linn/an order of plants having many styles.

One who practices or advocates polygyny.

The state or practice of having several wives at the same time; marriage to several wives.

A mineral usually occurring in fibrous masses, of a brick-red color, being tinged with iron, and consisting chiefly of the sulphates of lime, magnesia, and soda.

Having many sides, as a solid body.

A body or solid contained by many sides or planes.

Polyhedral.

One versed in various learning.

The Muse of lyric poetry.

A iodide having more than one atom of iodine in the molecule.

Talkativeness.

Garrulous; loquacious.

The condition of having more than two mamm/, or breasts.

Pertaining to polymathy; acquainted with many branches of learning.

One versed in many sciences; a person of various learning.

The knowledge of many arts and sciences; variety of learning.

Having numerous facets; -- said of the compound eyes of insects and crustaceans.

Any one of two or more substances related to each other by polymerism; specifically, a substance produced from another substance by chemical polymerization.

Having the same percentage composition (that is, having the same elements united in the same proportion by weight), but different molecular weights; -- often used with with; thus, cyanic acid (CNOH), fulminic acid (C2N2O2H2), and cyanuric acid (C3N3O3H3), are polymeric with each other.

The state, quality, or relation of two or more polymeric substances. The act or process of forming polymers.

The act or process of changing to a polymeric form; the condition resulting from such change.

To change into another substance having the same atomic proportions, but a higher molecular weight; to undergo polymerization; thus, aldehyde polymerizes in forming paraldehyde.

Having many parts or members in each set.

See Polyhymnia.

A stone marked with dendrites and black lines, and so disposed as to represent rivers, marshes, etc.

A substance capable of crystallizing in several distinct forms; also, any one of these forms. Cf. Allomorph.

Polymorphous.

Same as Pleomorphism.

The assumption of several structural forms without a corresponding difference in function; -- said of sponges, etc.

Having, or assuming, a variety of forms, characters, or styles; as, a polymorphous author.

Existence in many forms; polymorphism.

Same as Oscines.

Polymyoid.

Having numerous vocal muscles; of or pertaining to the Polymyod/.

Any one of numerous species of tropical food fishes of the family Polynemid/. They have several slender filaments, often very long, below the pectoral fin. Some of them yield isinglass of good quality. Called also threadfish.

Of or pertaining to the polynemes, or the family Polynemid/.

Of or pertaining to Polynesia (the islands of the eastern and central Pacific), or to the Polynesians.

The race of men native in Polynesia.

The open sea supposed to surround the north pole.

Containing many names or terms; multinominal; as, the polynomial theorem.

Containing many nuclei.

Having more than one nucleolus.

Having many eyes.

Having many names or titles; polyonymous.

The use of a variety of names for the same object.

An object which has a variety of names.

Polyonomous.

A glass through which objects appear multiplied, but diminished in size.

A view of many objects; also, a sort of panorama with dissolving views.

One of the feeding or nutritive zooids of a hydroid or coral. One of the Anthozoa. Same as Anthozoa. See Anthozoa, Madreporaria, Hydroid.

Producing or bearing a great number; bringing forth many.

Same as Polypidom.

See Polyp.

Of or pertaining to a polyp, or polyps.

A coloring matter found in many simple Anthozoa and some hydroids.

Consisting of, or having, several or many separate petals; as, a polypetalous corolla, flower, or plant.

Eating, or subsisting on, many kinds of food; as, polyphagous animals.

The practice or faculty of subsisting on many kinds of food.

The act or practice of prescribing too many medicines. A prescription made up of many medicines or ingredients.

Having or producing two or more phases; multiphase; as, a polyphase machine, a machine producing two or more pressure waves of electro-motive force, differing in phase; a polyphase current.

A machine generating more than one pressure wave; a multiphaser.

A very large American moth (Telea polyphemus) belonging to the Silkworm family (Bombycid/). Its larva, which is very large, bright green, with silvery tubercles, and with oblique white stripes on the sides, feeds on the oak, chestnut, willow, cherry, apple, and other trees. It produces a large amount of strong silk. Called also American silkworm.