Phorone
(Phor"one) n. [Camphor + acetone.] (Chem.) A yellow crystalline substance, having a geraniumlike
odor, regarded as a complex derivative of acetone, and obtained from certain camphor compounds.
Phoronis
(||Pho*ro"nis) n. [NL., fr. L. Phoronis, a surname of Io, Gr. .] (Zoöl.) A remarkable genus of
marine worms having tentacles around the mouth. It is usually classed with the gephyreans. Its larva
(Actinotrocha) undergoes a peculiar metamorphosis.
Phoronomia
(||Phor`o*no"mi*a) n. [NL.] See Phoronomics.
Phoronomics
(Phor`o*nom"ics) n. [Gr. a carrying, motion + a law.] The science of motion; kinematics.
[R.] Weisbach.
Phosgene
(Phos"gene) a. [Gr. light + the root of to be born: cf. F. phosgène.] (Old Chem.) Producing,
or produced by, the action of light; — formerly used specifically to designate a gas now called carbonyl
chloride. See Carbonyl.
Phosgenite
(Phos"gen*ite) n. (Min.) A rare mineral occurring in tetragonal crystals of a white, yellow,
or grayish color and adamantine luster. It is a chlorocarbonate of lead.
Phospham
(Phos"pham) n. [Phosphorus + ammonia.] (Chem.) An inert amorphous white powder,
PN2H, obtained by passing ammonia over heated phosphorus. [Spelt also phosphame.] — Phos"pham"ic
a.
Phosphate
(Phos"phate) n. (Chem.) A salt of phosphoric acid.
Phosphatic
(Phos*phat"ic) a. (Chem.) Pertaining to, or containing, phosphorus, phosphoric acid, or
phosphates; as, phosphatic nodules.
Phosphatic diathesis (Med.),
a habit of body which leads to the undue excretion of phosphates with
the urine.
Phosphaturia
(||Phos`pha*tu"ri*a) n. [NL. See Phosphate, and Urine.] (Med.) The excessive discharge
of phosphates in the urine.
Phosphene
(Phos"phene) n. [Gr. light + to show.] (Physiol.) A luminous impression produced through
excitation of the retina by some cause other than the impingement upon it of rays of light, as by pressure
upon the eyeball when the lids are closed. Cf. After-image.
Phosphide
(Phos"phide) n. (Chem.) A binary compound of phosphorus.
Phosphine
(Phos"phine) n. (Chem.) A colorless gas, PH3, analogous to ammonia, and having a disagreeable
odor resembling that of garlic. Called also hydrogen phosphide, and formerly, phosphureted hydrogen.
It is the most important compound of phosphorus and hydrogen, and is produced by the action of caustic
potash on phosphorus. It is spontaneously inflammable, owing to impurities, and in burning produces
peculiar vortical rings of smoke.
Phosphinic
(Phos*phin"ic) a. (Chem.) Pertaining to, or designating, certain acids analogous to the
phosphonic acids, but containing two hydrocarbon radicals, and derived from the secondary phosphines
by oxidation.
Phosphite
(Phos"phite) n. (Chem.) A salt of phosphorous acid.
Phosphonic
(Phos*phon"ic) a. [Phosphoric + sulphonic.] (Chem.) Pertaining to, or designating, certain
derivatives of phosphorous acid containing a hydrocarbon radical, and analogous to the sulphonic acid.