Webster's Dictionary 1913

10126

Pyrenoid

Py‐re″noid (?), n. [Gr. � like a kernel. See Pyrena, and -oid.] (Zoöl.) A transparent body found in the chromatophores of certain Infusoria.

10127

Pyrethrin

Pyr″eth‐rin (?), n. [NL. Pyrethrum, generic name of feverfew, Gr. � feverfew.] (Chem.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essent...

10128

Pyrethrine

Pyr″eth‐rine (?), n.(Chem.) An alkaloid extracted from the root of the pellitory of Spain (Anacyclus pyrethrum).

10129

Pyretic

Py‐ret″ic (?), a. [Gr. � burning heat, fever, from � fire: cf. F. pyrétique.] (Med.) Of or pertaining to fever; febrile.

10130

Pyretology

Pyr′e‐tol″o‐gy (?), n. [Gr. � fever + -logy: cf. F. pyrétologie.] (Med.) A discourse or treatise on fevers; the doctrine of fevers. Hooper.

10131

Pyrexia

‖Py‐rex″i‐a (?), n.; pl.Pyrexiæ (#). (Med.) The febrile condition.

10132

Pyrexial

{ Py‐rex″i‐al (?), Py‐rex″ic‐al (?), } a.(Med.) Of or pertaining to fever; feverish.

10133

Pyrgom

Pyr″gom (?), n.(Min.) A variety of pyroxene; — called also fassaite.

10134

Pyrheliometer

Pyr‐he′li‐om″e‐ter (?), n. [Gr. � fire + � sun + -meter.] (Physics) An instrument for measuring the direct heating effect of the sun's rays.

10135

Pyridic

Py‐rid″ic (?), a.(Physiol. Chem.) Related to, or formed from, pyridin or its homologues; as, the pyridic bases.

10136

Pyridine

Pyr″i‐dine (?), n.(Physiol. Chem.) A nitrogenous base, C5H5N, obtained from the distillation of bone oil or coal tar, and by the decomposition of certain alkaloids, as a colorle...

10137

Pyridyl

Pyr″i‐dyl (?), n. [Pyridine + -yl.] (Chem.) A hypothetical radical, C5H4N, regarded as the essential residue of pyridine, and analogous to phenyl.

10138

Pyriform

Pyr″i‐form (?), a. [L. pyrum, pirum, a pear + -form: cf. F. pyriforme, piriforme.] Having the form of a pear; pear-shaped.

10139

Pyritaceous

Pyr′i‐ta″ceous (?), a.(Min.) Of or pertaining to pyrites. See Pyritic.

10140

Pyrite

Pyr″ite (?), n.; pl.Pyrites (#). [Cf. F. pyrite. See Pyrites.] (Min.) A common mineral of a pale brass-yellow color and brilliant metallic luster, crystallizing in the isometric...

10141

Pyrites

Py‐ri″tes (?), n. [L., fr. Gr. �, fr. � fire. See Pyre.] (Min.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or ...

10142

Pyritic

{ Py‐rit″ic (?), Py‐rit″ic‐al (?), } a.(Min.) Of or pertaining to pyrites; consisting of, or resembling, pyrites.

10143

Pyritiferous

Pyr′i‐tif″er‐ous (?), a. [Pyrites + -ferous.] (Min.) Containing or producing pyrites.

10144

Pyritize

Pyr″i‐tize (?), v. t. [Cf. F. pyritiser.] To convert into pyrites.

10145

Pyritohedral

Pyr′i‐to‐he″dral (?), a. [See Pyritohedron.] (Crystallog.) Like pyrites in hemihedral form.

10146

Pyritohedron

Pyr′i‐to‐he″dron (?), n. [Pyrite + Gr. � base.] (Crystallog.) The pentagonal dodecahedron, a common form of pyrite.

10147

Pyritoid

Pyr″i‐toid (?), n. [Pyrite + -oid.] (Crystallog.) Pyritohedron.

10148

Pyritology

Pyr′i‐tol″o‐gy (?), n. [Gr. � of fire + -logy.] The science of blowpipe analysis.

10149

Pyritous

Pyr″i‐tous (?), a. Pyritic.

10150

Pyro

Py″ro (?), n.(Photog.) Abbreviation of pyrogallic acid.

10151

Pyro-

{ Pyro–, Pyr– }. Combining forms designating fire or heat; specifically (Chem.), used to imply an actual or theoretical derivative by the action of heat; as in pyrophosphoric, p...

10152

Pyroacetic

Pyr′o‐a‐ce″tic (?), a. [Pyro- + acetic: cf. F. pyroacétique.] (Chem.) Pertaining to, and designating, a substance (acetone) obtained by the distillation of the acetates. It is n...