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Periotic

Surrounding, or pertaining to the region surrounding, the internal ear; as, the periotic capsule. A periotic bone.

Peripatetic

One who walks about; a pedestrian; an itinerant.

Peripateticism

The doctrines or philosophical system of the peripatetics. See Peripatetic, n., 2.

Peripatus Peripatopsis

The type genus of Peripatopsidae, consisting of onychophorans (lowly organized invertebrates related evolutionarily to the arthropods, also called /walking worms/ AND /velvet worms/) found chiefly in Asiatic and African tropical regions, in South Africa, Australia, New Zealand, and tropical America.

Peripheral

Of or pertaining to a periphery; constituting a periphery; peripheric.

Periphery

The outside or superficial portions of a body; the surface.

Periproct

The region surrounding the anus, particularly of echinoderms.

Peripteral

Having columns on all sides; -- said of an edifice. See Apteral.

Periptery

The region surrounding a moving body, such as the wing of a bird or a gliding a/roplane, within which cyclic or vortical motion of the air occur.

Perique

A kind of tobacco with medium-sized leaf, small stem, tough and gummy fiber, raised in Louisiana, and cured in its own juices, so as to be very dark colored, usually black. It is marketed in tightly wrapped rolls called carottes.

Perisarc

The outer, hardened integument which covers most hydroids.

Periscian

Having the shadow moving all around.

Periscii Periscians

Those who live within a polar circle, whose shadows, during some summer days, will move entirely round, falling toward every point of the compass.

Perishable

Liable to perish; subject to decay, destruction, or death; as, perishable goods; our perishable bodies.

Perishableness

The quality or state of being perishable; liability to decay or destruction.

Perisome

The entire covering of an invertebrate animal, as echinoderm or c/lenterate; the integument.

Perisperm

The albumen of a seed, especially that portion which is formed outside of the embryo sac.

Perispomenon

A word which has the circumflex accent on the last syllable.

Perissad

Odd; not even; -- said of elementary substances and of radicals whose valence is not divisible by two without a remainder. Contrasted with artiad.

Perissodactyla

A division of ungulate mammals, including those that have an odd number of toes, as the horse, tapir, and rhinoceros; -- opposed to Artiodactyla.

Peristaltic

Pertaining to a wormlike wave motion of the intestines, and by analogy, of other flexible tubular structures. In the body it is produced by a progressive contraction of the muscular fibers of their walls, forcing their contents onwards in the direction of the wave; as, peristaltic movement.

Peristeria

A genus of orchidaceous plants. See Dove plant.

Peristerite

A variety of albite, whitish and slightly iridescent like a pigeon's neck.

Peristeropodous

Having pigeonlike feet; -- said of those gallinaceous birds that rest on all four toes, as the curassows and megapods.

Peristole

Peristaltic action, especially of the intestines.

Peristome

The fringe of teeth around the orifice of the capsule of mosses. It consists of 4, 8, 16, 32, or 64 teeth, and may be either single or double.

Peristrephic

Turning around; rotatory; revolving; as, a peristrephic painting (of a panorama).

Peristyle

A range of columns with their entablature, etc.; specifically, a complete system of columns, whether on all sides of a court, or surrounding a building, such as the cella of a temple. Used in the former sense, it gives name to the larger and inner court of a Roman dwelling, the peristyle. See Colonnade.

Perisystole

The interval between the diastole and systole of the heart. It is perceptible only in the dying.

Perithecium

An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification.

Peritomous

Cleaving in more directions than one, parallel to the axis.

Peritoneum

The smooth serous membrane which lines the cavity of the abdomen, or the whole body cavity when there is no diaphragm, and, turning back, surrounds the viscera, forming a closed, or nearly closed, sac.

Peritreme

That part of the integument of an insect which surrounds the spiracles. The edge of the aperture of a univalve shell.

Peritricha

A division of ciliated Infusoria having a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas. See Vorticella.

Peritrochium

The wheel which, together with the axle, forms the axis in peritrochio, which see under Axis.

Perityphlitis

Inflammation of the connective tissue about the c/cum.

Perivascular

Around the blood vessels; as, perivascular lymphatics.

Perivisceral

Around the viscera; as, the perivisceral cavity.

Perivitelline

Situated around the vitellus, or between the vitellus and zona pellucida of an ovum.

Periwig

To dress with a periwig, or with false hair.

periwigged

Wearing a peruke (a style of wig popular for men in the 17th and 18th centuries).

Perjured

Guilty of perjury; having sworn falsely; forsworn.

Perjurer

One who is guilty of perjury; one who perjures or forswears, in any sense.

Perk

To peer; to look inquisitively.

Perkinism

A remedial treatment, by drawing the pointed extremities of two rods, each of a different metal, over the affected part; tractoration, -- first employed by Dr. Elisha Perkins of Norwich, Conn. See Metallotherapy.

Perky

Perk; pert; jaunty; trim.

Perlid

Any insect of the genus Perla, or family Perlid/. See Stone fly, under Stone.

Perlitic

Relating to or resembling perlite, or pearlstone; as, the perlitic structure of certain rocks. See Pearlite.

Permanency Permanence

The quality or state of being permanent; continuance in the same state or place; duration; fixedness; as, the permanence of institutions; the permanence of nature.

Permanent

Continuing in the same state, or without any change that destroys form or character; remaining unaltered or unremoved; abiding; durable; fixed; stable; lasting; as, a permanent impression.

permanent

A wave or curl in the hair that lasts for months and is made durable by treating the hair with chemicals when it is curled.

permanent wave

A wave or curl in the hair that lasts for months and is made durable by treating the hair with chemicals when it is curled.

permanent-press

Having a permanent crease, or remaining unwrinkled without pressing; -- used of fabrics that do not require ironing.

Permanganic

Pertaining to, or designating, one of the higher acids of manganese, HMnO4, which forms salts called permanganates.

Permeable

Capable of being permeated, or passed through; yielding passage; passable; penetrable; -- used especially of substances which allow the passage of fluids; as, wood is permeable to oil; glass is permeable to light.

Permeance

Permeation; the reciprocal of reluctance.

Permeate

To pass through the pores or interstices of; to penetrate and pass through without causing rupture or displacement; -- applied especially to fluids which pass through substances of loose texture; as, water permeates sand.

permeated

p. p. of permeate; as, Her poems are permeated with sorrow.

Permeation

The act of permeating, passing through, or spreading throughout, the pores or interstices of any substance.

permed

Treated with chemicals to make it curly; having been given a permanent wave; -- of hair; as, permed hair.

Permian

Belonging or relating to the period, and also to the formation, next following the Carboniferous, and regarded as closing the Carboniferous age and Paleozoic era. The Permian period. See Chart of Geology.

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