Pernyi moth (Zoology) A silk- producing moth ( Attacus Pernyi ) which feeds upon the oak. It has been introduced into Europe and America from China.

Perofskite noun [ From von Perovski , of St.Petersburg.] (Min.) A titanate of lime occurring in octahedral or cubic crystals. [ Written also Perovskite .]

Perogue noun See Pirogue .

Peronate adjective [ Latin peronatus rough...booted, from pero , -onis , a kind of rough boot.] (Botany) A term applied to the stipes or stalks of certain fungi which are covered with a woolly substance which at length becomes powdery. Henslow.

Peroneal adjective [ Greek ... the fibula.] (Anat.) Of or pertaining to the fibula; in the region of the fibula.

Perorate intransitive verb [ See Peroration .] To make a peroration; to harangue. [ Colloq.]

Peroration noun [ Latin peroratio , from perorate , peroratum , to speak from beginning to end; per + orate to speak. See Per- , and Oration .] (Rhet.) The concluding part of an oration; especially, a final summing up and enforcement of an argument. Burke.

Peroxidation noun Act, process, or result of peroxidizing; oxidation to a peroxide.

Peroxide noun (Chemistry) An oxide containing more oxygen than some other oxide of the same element. Formerly peroxides were regarded as the highest oxides. Confer Per- , 2.

Peroxidize transitive verb [ imperfect & past participle Peroxidized ; present participle & verbal noun Peroxidizing .] (Chemistry) To oxidize to the utmost degree, so as to form a peroxide.

Perpend transitive verb [ Latin perpendere , perpensum ; per + pendere to weight.] To weight carefully in the mind. [ R.] " Perpend my words." Shak.

Perpend intransitive verb To attend; to be attentive. [ R.] Shak.

Perpend stone See Perpender .

Perpender noun [ French parpaing , pierre parpaigne ; of uncertain origin.] (Masonry) A large stone reaching through a wall so as to appear on both sides of it, and acting as a binder; -- called also perbend , perpend stone , and perpent stone .

Perpendicle noun [ Latin perpendiculum ; per + pendere to hang: confer French perpendicule .] Something hanging straight down; a plumb line. [ Obsolete]

Perpendicular adjective [ Latin perpendicularis , perpendicularius : confer French perpendiculaire . See Perpendicle , Pension .]
1. Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.

2. (Geom.) At right angles to a given line or surface; as, the line ad is perpendicular to the line bc .

Perpendicular style (Architecture) , a name given to the latest variety of English Gothic architecture, which prevailed from the close of the 14th century to the early part of the 16th; -- probably so called from the vertical style of its window mullions.

Perpendicular noun
1. A line at right angles to the plane of the horizon; a vertical line or direction.

2. (Geom.) A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.

Perpendicularity noun [ Confer French perpendicularité .] The quality or state of being perpendicular.

Perpendicularly adverb In a perpendicular manner; vertically.

Perpension noun [ See Perpend .] Careful consideration; pondering. [ Obsolete] Sir T. Browne.

Perpensity noun Perpension. [ Obsolete]

Perpent stone See Perpender .

Perpession noun [ Latin perpessio , from perpeti , perpessus , to bear steadfastly; per + pati to bear.] Suffering; endurance. [ Obsolete] Bp. Pearson.

Perpetrable adjective Capable of being perpetrated. R. North.

Perpetrate transitive verb [ imperfect & past participle Perpetrated ; present participle & verbal noun Perpetrating .] [ Latin perpetratus , past participle of perpetrare to effect, perpetrare; per + patrare to perform.] To do or perform; to carry through; to execute, commonly in a bad sense; to commit (as a crime, an offense); to be guilty of; as, to perpetrate a foul deed.

What the worst perpetrate , or best endure.

Young.

Perpetration noun [ Latin perpetratio : confer French perpétration .]
1. The act of perpetrating; a doing; -- commonly used of doing something wrong, as a crime.

2. The thing perpetrated; an evil action.

Perpetrator noun [ Latin ] One who perpetrates; esp., one who commits an offense or crime.

Perpetuable adjective Capable of being perpetuated or continued.

Varieties are perpetuable , like species.

Gray.

Perpetual adjective [ Middle English perpetuel , French perpétuel , from Latin perpetualis , from perpetuus continuing throughout, continuous, from perpes , -etis , lasting throughout.] Neverceasing; continuing forever or for an unlimited time; unfailing; everlasting; continuous.

Unto the kingdom of perpetual night.

Shak.

Perpetual feast of nectared sweets.

Milton.

Circle of perpetual apparition , or occultation . See under Circle . -- Perpetual calendar , a calendar so devised that it may be adjusted for any month or year. -- Perpetual curacy (Ch. of Eng.) , a curacy in which all the tithes are appropriated, and no vicarage is endowed. Blackstone. -- Perpetual motion . See under Motion . -- Perpetual screw . See Endless screw , under Screw .

Syn. -- Continual; unceasing; endless; everlasting; incessant; constant; eternal. See Constant .

Perpetual calendar A calendar that can be used perpetually or over a wide range of years. That of Capt. Herschel covers, as given below, dates from 1750 to 1961 only, but is capable of indefinite extension.

Perpetually adverb In a perpetual manner; constantly; continually.

The Bible and Common Prayer Book in the vulgar tongue, being perpetually read in churches, have proved a kind of standard for language.

Swift.

Perpetualty noun The state or condition of being perpetual. [ Obsolete] Testament of Love.

Per*pet"u*ance noun Perpetuity. [ Obsolete]

Perpetuate transitive verb [ imperfect & past participle Perpetuated ; present participle & verbal noun Perpetuating .] [ Latin perpetuatus , past participle of perpetuare to perpetuate. See Perpetual .] To make perpetual; to cause to endure, or to be continued, indefinitely; to preserve from extinction or oblivion; to eternize. Addison. Burke.

Perpetuate adjective [ Latin perpetuatus , past participle ] Made perpetual; perpetuated. [ R.] Southey.

Perpetuation noun [ Confer French perpétuation .] The act of making perpetual, or of preserving from extinction through an endless existence, or for an indefinite period of time; continuance. Sir T. Browne.

Perpetuity noun [ Latin perpetuitas : confer French perpétuité .]
1. The quality or state of being perpetual; as, the perpetuity of laws. Bacon.

A path to perpetuity of fame.

Byron.

The perpetuity of single emotion is insanity.

I. Taylor.

2. Something that is perpetual. South.

3. Endless time. "And yet we should, for perpetuity , go hence in debt." Shak.

4. (Annuities) (a) The number of years in which the simple interest of any sum becomes equal to the principal. (b) The number of years' purchase to be given for an annuity to continue forever. (c) A perpetual annuity.

5. (Law) (a) Duration without limitations as to time. (b) The quality or condition of an estate by which it becomes inalienable, either perpetually or for a very long period; also, the estate itself so modified or perpetuated.

Perplex transitive verb [ imperfect & past participle Perplexed ; present participle & verbal noun Perplexing .] [ Latin perplexari . See Perplex , adjective ]
1. To involve; to entangle; to make intricate or complicated, and difficult to be unraveled or understood; as, to perplex one with doubts.

No artful wildness to perplex the scene.

Pope.

What was thought obscure, perplexed , and too hard for our weak parts, will lie open to the understanding in a fair view.

Locke.

2. To embarrass; to puzzle; to distract; to bewilder; to confuse; to trouble with ambiguity, suspense, or anxiety. " Perplexd beyond self-explication." Shak.

We are perplexed , but not in despair.

2 Cor. iv. 8.

We can distinguish no general truths, or at least shall be apt to perplex the mind.

Locke.

3. To plague; to vex; to tormen. Glanvill.

Syn. -- To entangle; involve; complicate; embarrass; puzzle; bewilder; confuse; distract. See Embarrass .

Perplex adjective [ Latin perplexus entangled, intricate; per + plectere , plexum , to plait, braid: confer French perplexe . See Per- , and Plait .] Intricate; difficult. [ Obsolete] Glanvill.

Perplexed adjective Entangled, involved, or confused; hence, embarrassd; puzzled; doubtful; anxious. -- Per*plex"ed*ly adverb -- Per*plex"ed*ness , noun

Perplexing adjective Embarrassing; puzzling; troublesome. " Perplexing thoughts." Milton.

Perplexity noun ; plural Perplexities . [ Latin perplexitas : confer French perplexité .] The quality or state of being perplexed or puzzled; complication; intricacy; entanglement; distraction of mind through doubt or difficulty; embarrassment; bewilderment; doubt.

By their own perplexities involved,
They ravel more.

Milton.

Perplexiveness noun The quality of being perplexing; tendency to perplex. [ Obsolete] Dr. H. More.

Perplexly adverb Perplexedly. [ Obsolete] Milton.

Perpotation noun [ Latin perpotatio , from perpotate . See Per- , and Potation .] The act of drinking excessively; a drinking bout. [ Obsolete]

Perquisite noun [ Latin perquisitum , from perquisitus , past participle of perquirere to ask for diligently; per + quaerere to seek. See Per- , and Quest .]
1. Something gained from a place or employment over and above the ordinary salary or fixed wages for services rendered; especially, a fee allowed by law to an officer for a specific service.

The pillage of a place taken by storm was regarded as the perquisite of the soldiers.

Prescott.

The best perquisites of a place are the advantages it gaves a man of doing good.

Addison.

2. plural (Law) Things gotten by a man's own industry, or purchased with his own money, as opposed to things which come to him by descent. Mozley & W.

Perquisited adjective Supplied with perquisites. [ Obsolete] " Perquisited varlets frequent stand." Savage.

Perquisition noun [ Confer French perquisition .] A thorough inquiry of search. [ R.] Berkeley.

Perradial adjective (Zoology) Situated around the radii, or radial tubes, of a radiate.

Perrie noun [ French pierreries , plural, from pierre stone, Latin petra .] Precious stones; jewels. [ Obsolete] [ Written also perre , perrye , etc.] Chaucer.

Perrier noun [ Old French perriere , perrier , French perrier . Confer Pederero .] (Mil.) A short mortar used formerly for throwing stone shot. Hakluyt.