Webster's Dictionary, 1913

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Pent past participle or adjective [ From Pen , transitive verb ] Penned or shut up; confined; -- often with up .

Here in the body pent .
J. Montgomery.

No pent-up Utica contracts your powers.
J. M. Sewall.

Penta- [ Greek ..., a later combining form of ... five. See Five .]
1. A combining form denoting five ; as, penta capsular; penta gon.

2. (Chemistry) Denoting the degree of five , either as regards quality, property, or composition; as, penta sulphide; pent oxide, etc. Also used adjectively.

Pentabasic adjective [ Penta- + basic .] (Chemistry) 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 adjective [ Penta- + capsular .] (Botany) Having five capsules.

Pentachenium noun [ New Latin See Penta- , and Achenium .] (Botany) A dry fruit composed of five carpels, which are covered by an epigynous calyx and separate at maturity.

Pentachloride noun [ Penta- + chloride .] (Chemistry) A chloride having five atoms of chlorine in each molecule.

Pentachord noun [ Latin pentachordus five-stringed, Greek ...; ... five + ... string.]
1. An ancient instrument of music with five strings.

2. An order or system of five sounds. Busby.

Pentacid adjective [ Pent a- + acid .] (Chemistry) 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 noun [ Greek ... five.] 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 adjective [ See Penta- , Coccus .] (Botany) Composed of five united carpels with one seed in each, as certain fruits.

Pentaconter noun (Gr. Antiq.) See Penteconter .

Pentacrinin noun (Physiol. Chem.) A red and purple pigment found in certain crinoids of the genus Pentacrinus.

Pentacrinite noun [ Penta- + Greek ... a lily.] (Zoology) Any species of Pentacrinus.

Pentacrinoid noun [ Pentacrinus + -oid .] (Zoology) An immature comatula when it is still attached by a stem, and thus resembles a Pentacrinus.

Pentacrinus noun [ New Latin See Penta- , and Crinum .] (Zoology) A genus of large, stalked crinoids, of which several species occur in deep water among the West Indies and elsewhere.

Pentacron noun ; plural Latin Pentacra , English Pentacrons . [ New Latin , from Greek ... five + ... a summit.] (Geom.) A solid having five summits or angular points.

Pentacrostic noun [ Penta- + acrostic .] 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 noun [ Greek ..., ..., a body of five, from ... five.] (Chemistry) 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 adjective (Chemistry) Having the valence of a pentad.

Pentadactyl, Pentadactyle adjective [ Greek ... with five fingers or toes. See Penta- , and Dactyl .]
1. (Anat.) Having five digits to the hand or foot.

2. Having five appendages resembling fingers or toes.

Pentadactyloid adjective [ Pentadactyl + -oid .] (Anat.) Having the form of, or a structure modified from, a pentadactyl limb.

Pentadecane noun [ Penta- + Greek ... ten.] (Chemistry) A hydrocarbon of the paraffin series, (C 15 H 32 ) found in petroleum, tar oil, etc., and obtained as a colorless liquid; -- so called from the fifteen carbon atoms in the molecule.

Pentadecatoic adjective [ Penta- + decatoic .] (Chemistry) Of, pertaining to, or derived from, pentadecane, or designating an acid related to it.

Pentadecylic adjective [ Penta- + decylic .] (Chemistry) Same as Quindecylic .

Pentadelphous adjective [ Penta- + Greek ... brother.] (Botany) Having the stamens arranged in five clusters, those of each cluster having their filaments more or less united, as the flowers of the linden.

Pentafid adjective [ Penta- + root of Latin findere to split.] (Botany) Divided or cleft into five parts.

Pentaglot noun [ Penta- + -glot , as in polyglot .] A work in five different tongues.

Pentagon noun [ Greek ...; ... (see Penta- ) + gwni`a angle: confer Latin pentagonium , French pentagone .] (Geom.) A plane figure having five angles, and, consequently, five sides; any figure having five angles.

Regular pentagon , a pentagon in which the angles are all equal, and the sides all equal.

Pentagonal adjective [ Confer French pentagonal , pentagone , Latin pentagonus , pentagonius , Greek ....] Having five corners or angles.

Pentagonal dodecahedron . See Dodecahedron , and Pyritohedron .

Pentagonally adverb In the form of a pentagon; with five angles. Sir T. Browne.

Pentagonous adjective Pentagonal.

Pentagram noun [ Greek ..., neut. of ... having five lines. See Penta- , and -gram .] A pentacle or a pentalpha. "Like a wizard pentagram ." Tennyson.

Pentagraphic, Pentagraphical adjective [ Corrupted from pantographic , - ical .] Pantographic. See Pantograph .

Pentagynia noun plural [ New Latin , from Greek ... (see Penta- ) + ... female.] (Botany) A Linnæan order of plants, having five styles or pistils.

Pentagynian, Pentagynous adjective (Botany) Of or pertaining to plants of the order Pentagyna; having five styles.

Pentahedral adjective Having five sides; as, a pentahedral figure.

Pentahedrical adjective Pentahedral. [ R.]

Pentahedron noun [ Penta- + Greek "e`dra seat, base.] A solid figure having five sides.

Pentahedrous adjective Pentahedral. Woodward.

Pentail noun (Zoology) A peculiar insectivore ( Ptilocercus Lowii ) of Borneo; -- so called from its very long, quill-shaped tail, which is scaly at the base and plumose at the tip.

Pentalpha noun [ New Latin , from Greek ...: confer French pentalpha . See Penta- , and Alpha .] A five-pointed star, resembling five alphas joined at their bases; -- used as a symbol.

Pentamera noun plural [ New Latin See Pentamerous .] (Zoology) An extensive division of Coleoptera, including those that normally have five-jointed tarsi. It embraces about half of all the known species of the Coleoptera.

Pentameran noun (Zoology) One of the Pentamera.

Pentamerous adjective [ Penta- + Greek ... part.]
1. (Biol.) Divided into, or consisting of, five parts; also, arranged in sets, with five parts in each set, as a flower with five sepals, five petals, five, or twice five, stamens, and five pistils.

2. (Zoology) Belonging to the Pentamera.

Pentamerus noun [ New Latin See Pentamerous .] (Paleon.) A genus of extinct Paleozoic brachiopods, often very abundant in the Upper Silurian.

Pentamerus limestone (Geol.) , a Silurian limestone composed largely of the shells of Pentamerus.

Pentameter noun [ Latin , from Greek ...; ... (see Penta- ) + ... measure.] (Gr. & Latin Pros.) A verse of five feet.

» The dactylic pentameter consists of two parts separated by a diæresis. Each part consists of two dactyls and a long syllable. The spondee may take the place of the dactyl in the first part, but not in the second. The elegiac distich consists of the hexameter followed by the pentameter. Harkness.

Pentameter adjective Having five metrical feet.

Pentamethylene noun [ Penta- + methylene .] (Chemistry) A hypothetical hydrocarbon, C 5 H 10 , metameric with the amylenes, and the nucleus of a large number of derivatives; -- so named because regarded as composed of five methylene residues. Confer Trimethylene , and Tetramethylene .

Pentandria noun plural [ New Latin , from Greek ... (see Penta- ) + ..., ..., man, male.] (Botany) A Linnæan class of plants having five separate stamens.

Pentandrian, Pentandrous adjective (Botany) Of or pertaining to the class Pentadria; having five stamens.