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Penta-
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A combining form denoting five; as, pentacapsular; pentagon.
Penta-
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Denoting the degree of five, either as regards quality, property, or composition; as, pentasulphide; pentoxide, etc. Also used adjectively.
Pentabasic
a.
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Capable of uniting with five molecules of a monacid base; having five acid hydrogen atoms capable of substitution by a basic radical; -- said of certain acids.
Pentacapsular
a.
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Having five capsules.
Pentachenium
n.
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A dry fruit composed of five carpels, which are covered by an epigynous calyx and separate at maturity.
Pentachloride
n.
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A chloride having five atoms of chlorine in each molecule.
Pentachord
n.
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An ancient instrument of music with five strings.
Pentachord
n.
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An order or system of five sounds.
Pentacid
a.
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Capable of neutralizing, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by acid residues; -- said of certain complex bases.
Pentacle
n.
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A figure composed of two equilateral triangles intersecting so as to form a six-pointed star, -- used in early ornamental art, and also with superstitious import by the astrologers and mystics of the Middle Ages.
Pentacoccous
a.
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Composed of five united carpels with one seed in each, as certain fruits.
Pentaconter
n.
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See Penteconter.
Pentacrinin
n.
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A red and purple pigment found in certain crinoids of the genus Pentacrinus.
Pentacrinite
n.
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Any species of Pentacrinus.
Pentacrinoid
n.
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An immature comatula when it is still attached by a stem, and thus resembles a Pentacrinus.
Pentacrinus
n.
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A genus of large, stalked crinoids, of which several species occur in deep water among the West Indies and elsewhere.
Pentacra
pl.
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of Pentacron
Pentacrons
pl.
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of Pentacron
Pentacron
n.
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A solid having five summits or angular points.
Pentacrostic
n.
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A set of verses so disposed that the name forming the subject of the acrostic occurs five times -- the whole set of verses being divided into five different parts from top to bottom.
Pentad
n.
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Any element, atom, or radical, having a valence of five, or which can be combined with, substituted for, or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.
Pentad
a.
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Having the valence of a pentad.
Pentadactyl
a.
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Alt. of Pentadactyle
Pentadactyle
a.
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Having five digits to the hand or foot.
Pentadactyle
a.
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Having five appendages resembling fingers or toes.
Pentadactyloid
a.
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Having the form of, or a structure modified from, a pentadactyl limb.
Pentadecane
n.
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A hydrocarbon of the paraffin series, (C15H32) found in petroleum, tar oil, etc., and obtained as a colorless liquid; -- so called from the fifteen carbon atoms in the molecule.
Pentadecatoic
a.
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Of, pertaining to, or derived from, pentadecane, or designating an acid related to it.
Pentadecylic
a.
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Same as Quindecylic.
Pentadelphous
a.
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Having the stamens arranged in five clusters, those of each cluster having their filaments more or less united, as the flowers of the linden.