Webster's Dictionary 1913

2350

Pentachenium

Pen′ta‐che″ni‐um (?), n. [NL. See Penta-, and Achenium.] (Bot.) A dry fruit composed of five carpels, which are covered by an epigynous calyx and separate at maturity.

2351

Pentachloride

Pen′ta‐chlo″ride (?), n. [Penta- + chloride.] (Chem.) A chloride having five atoms of chlorine in each molecule.

2352

Pentachord

Pen″ta‐chord (?), n. [L. pentachordus five-stringed, Gr. πεντάχορδοσ; πεντα- five + χορδή string.] 1. An ancient instrument of music with five strings.2. An order or system of f...

2353

Pentacid

Pen‐tac″id (�), a. [Penta- + acid.] (Chem.) Capable of neutralizing, or combining with, five molecules of a monobasic acid; having five hydrogen atoms capable of substitution by...

2354

Pentacle

Pen″ta‐cle (?), n. [Gr. πέντε 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 ...

2355

Pentacoccous

Pen′ta‐coc″cous (?), a. [See Penta-, Coccus.] (Bot.) Composed of five united carpels with one seed in each, as certain fruits.

2356

Pentaconter

Pen″ta‐con′ter (?), n.(Gr. Antiq.) See Penteconter.

2357

Pentacrinin

Pen‐tac″ri‐nin (?), n.(Physiol. Chem.) A red and purple pigment found in certain crinoids of the genus Pentacrinus.

2358

Pentacrinite

Pen‐tac″ri‐nite (?), n. [Penta- + Gr. κρίνον a lily.] (Zoöl.) Any species of Pentacrinus.

2359

Pentacrinoid

Pen‐tac″ri‐noid (?), n. [Pentacrinus + -oid.] (Zoöl.) An immature comatula when it is still attached by a stem, and thus resembles a Pentacrinus.

2360

Pentacrinus

‖Pen‐tac″ri‐nus (?), n. [NL. See Penta-, and Crinum.] (Zoöl.) A genus of large, stalked crinoids, of which several species occur in deep water among the West Indies and elsewhere.

2361

Pentacron

Pen‐ta″cron (?), n.; pl. L. Pentacra (#), E. Pentacrons (#). [NL., fr. Gr. πέντε five + ἄκρον a summit.] (Geom.) A solid having five summits or angular points.

2362

Pentacrostic

Pen′ta‐cros″tic (?), n. [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 divi...

2363

Pentad

Pen″tad (?), n. [Gr. πεντάσ-άδοσ, a body of five, fr. πέντε five.] (Chem.) Any element, atom, or radical, having a valence of five, or which can be combined with, substituted fo...

2364

Pentad (2)

Pen″tad, a.(Chem.) Having the valence of a pentad.

2365

Pentadactyl

{ Pen′ta‐dac″tyl, Pen′ta‐dac″tyle } (?), a. [Gr. πενταδάκτυλοσ with five fingers or toes. See Penta-, and Dactyl.] 1. (Anat.) Having five digits to the hand or foot.2. Having fi...

2366

Pentadactyloid

Pen′ta‐dac″tyl‐oid (?), a. [Pentadactyl + -oid.] (Anat.) Having the form of, or a structure modified from, a pentadactyl limb.

2367

Pentadecane

Pen′ta‐dec″ane (–dĕk″ān), n. [Penta- + Gr. δέκα ten.] (Chem.) A hydrocarbon of the paraffin series, (C15H32) found in petroleum, tar oil, etc., and obtained as a colorless liqui...

2368

Pentadecatoic

Pen′ta‐dec′a‐to″ic (–ȧ‐tō″ĭk), a. [Penta- + decatoic.] (Chem.) Of, pertaining to, or derived from, pentadecane, or designating an acid related to it.

2369

Pentadecylic

Pen′ta‐decyl″ic (–dē̍‐sĭl″ĭk), a. [Penta- + decylic.] (Chem.) Same as Quindecylic.

2370

Pentadelphous

Pen′ta‐del″phous (–dĕl″fŭs), a. [Penta- + Gr. αδελφὄσ brother.] (Bot.) Having the stamens arranged in five clusters, those of each cluster having their filaments more or less un...

2371

Pentafid

Pen″ta‐fid (pĕn″tȧ‐fĭd), a. [Penta- + root of L. findere to split.] (Bot.) Divided or cleft into five parts.

2372

Pentaglot

Pen″ta‐glot (–glŏt), n. [Penta- + -glot, as in polyglot.] A work in five different tongues.

2373

Pentagon

Pen″ta‐gon (?), n. [Gr. πεντάγωνον; πεντα- (see Penta-) + γωνία angle: cf. L. pentagonium, F. pentagone.] (Geom.) A plane figure having five angles, and, consequently, five side...

2374

Pentagonal

Pen‐tag″o‐nal (?), a. [Cf. F. pentagonal, pentagone, L. pentagonus, pentagonius, Gr. �.] Having five corners or angles.Pentagonal dodecahedron. See Dodecahedron, and Pyritohedron.

2375

Pentagonally

Pen‐tag″o‐nal‐ly, adv. In the form of a pentagon; with five angles. Sir T. Browne.

2376

Pentagonous

Pen‐tag″o‐nous (?), a. Pentagonal.