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Plenum
n.
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That state in which every part of space is supposed to be full of matter; -- opposed to vacuum.
Pleochroic
a.
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Having the property of pleochroism.
Pleochroism
n.
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The property possessed by some crystals, of showing different colors when viewed in the direction of different axes.
Pleochromatic
a.
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Pleochroic.
Pleochromatism
n.
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Pleochroism.
Pleochroous
a.
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Pleochroic.
Pleomorphic
a.
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Pertaining to pleomorphism; as, the pleomorphic character of bacteria.
Pleomorphism
n.
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The property of crystallizing under two or more distinct fundamental forms, including dimorphism and trimorphism.
Pleomorphism
n.
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The theory that the various genera of bacteria are phases or variations of growth of a number of Protean species, each of which may exhibit, according to undetermined conditions, all or some of the forms characteristic of the different genera and species.
Pleomorphous
a.
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Having the property of pleomorphism.
Pleonasm
n.
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Redundancy of language in speaking or writing; the use of more words than are necessary to express the idea; as, I saw it with my own eyes.
Pleonast
n.
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One who is addicted to pleonasm.
Pleonaste
n.
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A black variety of spinel.
Pleonastic
a.
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Alt. of Pleonastical
Pleonastical
a.
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Of or pertaining to pleonasm; of the nature of pleonasm; redundant.
Pleonastically
adv.
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In a pleonastic manner.
Pleopods
pl.
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of Pleopod
Pleopoda
pl.
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of Pleopod
Pleopod
n.
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One of the abdominal legs of a crustacean. See Illust. under Crustacea.
Plerome
n.
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The central column of parenchyma in a growing stem or root.
Plerophory
n.
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Fullness; full persuasion.
Plesance
n.
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Pleasance.
Plesh
n.
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A pool; a plash.
Plesimorphism
n.
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The property possessed by some substances of crystallizing in closely similar forms while unlike in chemical composition.
Plesiomorphous
a.
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Nearly alike in form.
Plesiosaur
n.
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One of the Plesiosauria.
Plesiosauria
n. pl.
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An extinct order of Mesozoic marine reptiles including the genera Plesiosaurus, and allied forms; -- called also Sauropterygia.
Plesiosaurian
n.
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A plesiosaur.
Plesiosauri
pl.
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of Plesiosaurus
Plesiosaurus
n.
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A genus of large extinct marine reptiles, having a very long neck, a small head, and paddles for swimming. It lived in the Mesozoic age.