Pharyngobranchii Pha·ryn`go·bran"chi·i noun plural [ New Latin See Pharynx , and Branchia .] (Zoology) Same as Leptocardia .

Pharyngognathi Phar`yn·gog"na·thi noun plural [ New Latin See Pharynx , and Gnathic .] (Zoology) A division of fishes in which the lower pharyngeal bones are united. It includes the scaroid, labroid, and embioticoid fishes.

Pharyngolaryngeal Pha·ryn`go·lar`yn·ge"al adjective [ Pharynx + laryngeal .] Of or pertaining both to pharynx and the larynx.

Pharyngopneusta Pha·ryn`gop·neus"ta noun plural [ New Latin , from Greek ... the pharynx + ... to breathe.] (Zoology) A group of invertebrates including the Tunicata and Enteropneusta. -- Pha*ryn`gop*neus"tal adjective

Pharyngotome Pha·ryn"go·tome noun (Surg.) An instrument for incising or scarifying the tonsils, etc.

Pharyngotomy Phar`yn·got"o·my noun [ Pharynx + Gr . ... to cut : confer French pharyngotomie .] (Surg.) (a) The operation of making an incision into the pharynx, to remove a tumor or anything that obstructs the passage. (b) Scarification or incision of the tonsils.

Pharynx Phar"ynx noun ; plural pharynges . [ New Latin , from Greek ..., ...: confer French pharynx .] (Anat.) The part of the alimentary canal between the cavity of the mouth and the esophagus. It has one or two external openings through the nose in the higher vertebrates, and lateral branchial openings in fishes and some amphibias.

Phascolome Phas"co·lome noun [ Greek ... pouch + ... mouse.] (Zoology) A marsupial of the genus Phascolomys ; a wombat.

Phase Phase noun ; plural Phases . [ New Latin phasis , Greek ..., from ... to make to appear: confer French phase . See Phenomenon , Phantom , and Emphasis .] 1. That which is exhibited to the eye; the appearance which anything manifests, especially any one among different and varying appearances of the same object.

2. Any appearance or aspect of an object of mental apprehension or view; as, the problem has many phases .

3. (Astron.) A particular appearance or state in a regularly recurring cycle of changes with respect to quantity of illumination or form of enlightened disk; as, the phases of the moon or planets. See Illust. under Moon .

4. (Physics) Any one point or portion in a recurring series of changes, as in the changes of motion of one of the particles constituting a wave or vibration; one portion of a series of such changes, in distinction from a contrasted portion, as the portion on one side of a position of equilibrium, in contrast with that on the opposite side.

Phase Phase noun 1. (Physics Chem.) A homogenous, physically distinct portion of matter in a system not homogeneous; as, the three phases , ice, water, and aqueous vapor. A phase may be either a single chemical substance or a mixture, as of gases.

2. (Zoology) In certain birds and mammals, one of two or more color variations characteristic of the species, but independent of the ordinary seasonal and sexual differences, and often also of age. Some of the herons which appear in white and colored phases, and certain squirrels which are sometimes uniformly blackish instead of the usual coloration, furnish examples. Color phases occur also in other animals, notably in butterflies.

3. (Electricity) The relation at any instant of a periodically varying electric magnitude, as electro-motive force, a current, etc., to its initial value as expressed in factorial parts of the complete cycle. It is usually expressed in angular measure, the cycle beb four right angles, or 360°. Such periodic variations are generally well represented by sine curves; and phase relations are shown by the relative positions of the crests and hollows of such curves. Magnitudes which have the same phase are said to be in phase .

Phase Phase transitive verb [ Confer Feeze .] To disturb the composure of; to disconcert; to nonplus. [ Colloq.]

Phase angle Phase angle (Electricity) The angle expressing phase relation.

Phase converter Phase converter (Electricity) A machine for converting an alternating current into an alternating current of a different number of phases and the same frequency.

Phase displacement Phase displacement (Electricity) A charge of phase whereby an alternating current attains its maximum later or earlier. An inductance would cause a lag, a capacity would cause an advance, in phase.

Phase meter, Phasemeter Phase meter, Phase"me`ter noun (Electricity) A device for measuring the difference in phase of two alternating currents of electromotive forces.

Phase rule Phase rule (Physics Chem.) A generalization with regard to systems of chemical equilibrium, discovered by Prof. J. Willard Gibbs. It may be stated thus: The degree of variableness (number of degrees of freedom) of a system is equal to the number of components minus the number of phases, plus two . Thus, if the components be salt and water, and the phases salt, ice, saturated solution, and vapor, the system is invariant, that is, there is only one set of conditions under which these four phases can exist in equilibrium. If only three phases be considered, the system is univariant, that is, the fixing of one condition, as temperature, determines the others.

Phase splitter Phase splitter (Electricity) A device by which a single-phase current is split into two or more currents differing in phase. It is used in starting single-phase induction motors.

Phase splitting Phase splitting (Electricity) The dephasing of the two parts of a single alternating current in two dissimilar branches of a given circuit.

Phasel Pha"sel noun [ Latin phaselus , phaseolus , Greek ..., ...: confer French phaséole , faséole . Confer Fesels .] The French bean, or kidney bean.

Phaseless Phase"less adjective Without a phase, or visible form. [ R.] "A phaseless and increasing gloom." Poe.

Phaseolus Pha·se"o·lus noun [ Latin ] (Botany) A genus of leguminous plants, including the Lima bean, the kidney bean, the scarlet runner, etc. See Bean .

Phaseomannite Pha`se·o·man"nite noun [ So called because found in the unripe fruit of the bean ( Phaseolus vulgaris ).] (Chemistry) Same as Inosite .

Phasing Phas"ing adjective (Electricity) Pertaining to phase or differences of phase.

Phasing current Phasing current The momentary current between two alternating-current generators when juxtaposed in parallel and not agreeing exactly in phase or period.

Phasing transformer Phasing transformer Any of several transformers (there must be at least two) for changing phase.

Phasis Pha"sis noun ; plural Phases . [ New Latin ] See Phase . Creech.

Phasm, Phasma Phasm, Phas"ma noun [ Latin phasma , Greek .... See Phase .] An apparition; a phantom; an appearance. [ R.] Hammond. Sir T. Herbert.

Phasmid Phas"mid noun [ See Phasm . Probably so called from its mimicking, or appearing like, inanimate objects.] (Zoology) Any orthopterous insect of the family Phasmidæ , as a leaf insect or a stick insect.

Phassachate Phas"sa·chate noun [ Greek ... the wood pigeon + ... the agate.] (Min.) The lead-colored agate; -- so called in reference to its color.

Phatagin Phat"a·gin noun [ Confer Greek ...; perhaps from native name.] (Zoology) The long-tailed pangolin ( Manis tetradactyla ); -- called also ipi .

Pheasant Pheas"ant noun [ Middle English fesant , fesaunt , Old French faisant , faisan , French faisan , Latin phasianus , Greek ... (sc. ...) the Phasian bird, pheasant, from ... a river in Colchis or Pontus.] 1. (Zoology) Any one of numerous species of large gallinaceous birds of the genus Phasianus , and many other genera of the family Phasianidæ , found chiefly in Asia.

» The common, or English, pheasant ( Phasianus Colchicus ) is now found over most of temperate Europe, but was introduced from Asia. The ring-necked pheasant ( P. torquatus ) and the green pheasant ( P. versicolor ) have been introduced into Oregon. The golden pheasant ( Thaumalea picta ) is one of the most beautiful species. The silver pheasant ( Euplocamus nychthemerus ) of China, and several related species from Southern Asia, are very beautiful.

2. (Zoology) The ruffed grouse. [ Southern U.S.]

» Various other birds are locally called pheasants , as the lyre bird, the leipoa, etc.

Fireback pheasant . See Fireback . -- Gold , or Golden , pheasant (Zoology) , a Chinese pheasant ( Thaumalea picta ), having rich, varied colors. The crest is amber-colored, the rump is golden yellow, and the under parts are scarlet. -- Mountain pheasant (Zoology) , the ruffed grouse. [ Local, U.S.] -- Pheasant coucal (Zoology) , a large Australian cuckoo ( Centropus phasianus ). The general color is black, with chestnut wings and brown tail. Called also pheasant cuckoo . The name is also applied to other allied species. -- Pheasant duck . (Zoology) (a) The pintail . (b) The hooded merganser. -- Pheasant parrot (Zoology) , a large and beautiful Australian parrakeet ( Platycercus Adelaidensis ). The male has the back black, the feathers margined with yellowish blue and scarlet, the quills deep blue, the wing coverts and cheeks light blue, the crown, sides of the neck, breast, and middle of the belly scarlet. -- Pheasant's eye . (Botany) (a) A red-flowered herb ( Adonis autumnalis ) of the Crowfoot family; -- called also pheasant's-eye Adonis . (b) The garden pink ( Dianthus plumarius ); - - called also Pheasant's-eye pink . -- Pheasant shell (Zoology) , any marine univalve shell of the genus Phasianella , of which numerous species are found in tropical seas. The shell is smooth and usually richly colored, the colors often forming blotches like those of a pheasant. -- Pheasant wood . (Botany) Same as Partridge wood (a) , under Partridge . -- Sea pheasant (Zoology) , the pintail. -- Water pheasant . (Zoology) (a) The sheldrake . (b) The hooded merganser.

Pheasantry Pheas"ant·ry noun [ Confer French faisanderie .] A place for keeping and rearing pheasants. Gwilt.

Phebe Phe"be noun (Zoology) See Phœbe .

Pheer Pheer noun See 1st Fere . [ Obsolete] Spenser.

Pheese Pheese transitive verb To comb; also, to beat; to worry. [ Obsolete or Local] See Feaze , v.

Pheese Pheese noun Fretful excitement. [ Obsolete or Local] See Feaze , noun

Phelloderm Phel"lo·derm noun [ Greek ... cork + -derm .] (Botany) A layer of green parenchimatous cells formed on the inner side of the phellogen.

Phellogen Phel"lo·gen noun [ Greek ... cork + - gen .] (Botany) The tissue of young cells which produces cork cells.

Phelloplastics Phel`lo·plas"tics noun [ Greek ... cork + ... to mold.] Art of modeling in cork.

Phenacetin, Phenacetine Phe·nac"e·tin, Phe·nac"e·tine noun [ Phen yl + acet ic + -in .] (Pharm.) A white, crystalline compound, C ₁₀ H ₁₃ O ₂ N, used in medicine principally as an antipyretic.

Phenacite Phen"a·cite noun [ Greek ..., ..., impostor, deceiver.] (Min.) A glassy colorless mineral occurring in rhombohedral crystals, sometimes used as a gem. It is a silicate of glucina, and receives its name from its deceptive similarity to quartz.

Phenakistoscope Phen`a·kis"to·scope noun [ Greek ... a deceiver + -scope .] A revolving disk on which figures drawn in different relative attitudes are seen successively, so as to produce the appearance of an object in actual motion, as an animal leaping, etc., in consequence of the persistence of the successive visual impressions of the retina. It is often arranged so that the figures may be projected upon a screen.

Phenalgin Phe·nal"gin noun [ Phen yl + an alg etic + -in .] (Pharm.) An ammoniated compound of phenyl and acetamide, used as an analgesic and antipyretic. It resembles phenacetin in its therapeutic action.

Phenanthrene Phe·nan"threne noun [ Phen yl + antr ac ene .] (Chemistry) A complex hydrocarbon, C ₁₄ H ₁₀ , found in coal tar, and obtained as a white crystalline substance with a bluish fluorescence.

Phenanthridine Phe·nan"thri·dine noun [ Phenanthr ene + pyr idine .] (Chemistry) A nitrogenous hydrocarbon base, C ₁₃ H ₉ N, analogous to phenanthrene and quinoline.

Phenanthroline Phe·nan"thro·line noun [ Phenanthr ene + quin oline .] (Chemistry) Either of two metameric nitrogenous hydrocarbon bases, C ₁₂ H ₈ N ₂ , analogous to phenanthridine, but more highly nitrogenized.

Phene Phene noun (Chemistry) Benzene. [ Obsolete]

Phenetol Phe"ne·tol noun [ Phen yl + et hyl + Latin ol eum oil.] (Chemistry) The ethyl ether of phenol, obtained as an aromatic liquid, C ₆ H ₅ .O.C ₂ H ₅ .

Phenic Phe"nic adjective (Chemistry) Of, pertaining to, derived from, or resembling, phenyl or phenol.

Phenic acid (Chemistry) , a phenol. [ Obsoles.]

Phenician Phe·ni"cian adjective & noun See Phœnician .

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