Part 251

Phren"tic (?), n. & a. See Phrenetic. [Obs.]

Phry*ga"ne*id (?), n. (Zoˆl.) Any insect belonging to the Phryganeides.

||Phryg`a*ne"i*des (?), n. pl. [NL., fr. Phryganea, the typical genus, ||fr. Gr. &?; a dry stick.] (Zoˆl.) A tribe of neuropterous insects ||which includes the caddice flies; -- called also Trichoptera. See ||Trichoptera. [Written also Phryganides.]

Phryg"i*an (?), a. [L. Phrygius, Gr. &?;, fr. &?; Phrygia, a country of Asia Minor.] Of or pertaining to Phrygia, or to its inhabitants.

Phrygian mode (Mus.), one of the ancient Greek modes, very bold and vehement in style; -- so called because fabled to have been invented by the Phrygian Marsyas. Moore (Encyc. of Music). -- Phrygian stone, a light, spongy stone, resembling a pumice, -- used by the ancients in dyeing, and said to be drying and astringent.

Phryg"i*an, n. 1. A native or inhabitant of Phrygia.

2. (Eccl. Hist.) A Montanist.

Phthal"ate (?), n. (Chem.) A salt of phthalic acid.

Phthal"e*in (?), n. [See Phthalic.] (Chem.) One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleÔn. Their alkaline solutions are fluorescent.

Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies is brilliant red, but is decolorized by acids, and as this reaction is exceedingly delicate it is used as an indicator.

Phthal"ic (?), a. [Naphthalene + -ic.] (Chem.) Pertaining to, or designating, a dibasic acid obtained by the oxidation of naphthalene and allied substances.

Phthalic acid (Chem.), a white crystalline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

Phthal"ide (?), n. [Phthalyl + anhydride.] (Chem.) A lactone obtained by reduction of phthalyl chloride, as a white crystalline substance; hence, by extension, any one of the series of which phthalide proper is the type. [Written also phthalid.]

Phthal"i*mide (?), n. [Phthalic + imide.] (Chem.) An imido derivative of phthalic acid, obtained as a white crystalline substance, C6H4.(CO)2NH, which has itself (like succinimide) acid properties, and forms a series of salts. Cf. Imido acid, under Imido.

Phthal"in (?), n. (Chem.) A colorless crystalline substance obtained by reduction from phthaleÔn, into which it is easily converted by oxidation; hence, any one of the series of which phthalin proper is the type.

Phthal"yl (?), n. [Phthalic + -yl.] (Chem.) The hypothetical radical of phthalic acid.

||Phthi*ri"a*sis (?), n. [L., fr. Gr. &?;, fr. &?; louse.] (Med.) A ||disease (morbus pediculous) consisting in the excessive ||multiplication of lice on the human body.

Phthis"ic (?), n. Same as Phthisis.

Phthis"ic*al (?), a. [L. phthisicus, Gr. &?;: cf. F. phthisique. See Phthisis.] Of or pertaining to phthisis; affected with phthisis; wasting; consumptive.

Phthis"ick*y (?), a. Having phthisis, or some symptom of it, as difficulty in breathing.

Phthis`i*ol"o*gy (?), n. [Phthisis + -logy.] (Med.) A treatise on phthisis. Dunglison.

{ ||Phthis`ip*neu*mo"ni*a (?), Phthis`ip*neu"mo*ny (?), } n. [NL. See Phthisis, Pneumonia.] (Med.) Pulmonary consumption.

Phthi"sis (?), n. [L., fr. Gr. &?;, fr. &?; to pass or waste away: cf. F. phthisie.] (Med.) A wasting or consumption of the tissues. The term was formerly applied to many wasting diseases, but is now usually restricted to pulmonary phthisis, or consumption. See Consumption.

Fibroid phthisis. See under Fibroid.

Phthon"gal (?), a. [Gr. &?; voice.] Formed into, or characterized by, voice; vocalized; -- said of all the vowels and the semivowels, also of the vocal or sonant consonants g, d, b, l, r, v, z, etc.

Phthon"gal, n. A vocalized element or letter.

Phthon*gom"e*ter (?), n. [Gr. &?; voice + -meter.] An instrument for measuring vocal sounds. Whewell.

Phthor (?), n. [F. phthore, Gr. &?; to destroy.] (Old Chem.) Fluorine. [Written also phthor.]