a. [ Gr. 'ale`xein to keep off + pyreto`s burning heat, fever, py^r fire. ] (Med.) Serving to drive off fever; antipyretic; antifebrile. [ archaic ] -- n. An antipyretic drug; a febrifuge. [ archaic ] [ 1913 Webster + AS ]

n. 1. 1 a white crystalline substance used as an analgesic and antipyretic.
Syn. -- amidopyrine [ WordNet 1.5 ]

‖n. [ NL., fr. Gr. 'anti` against + &unr_; to be feverish, fr. &unr_; fire. ] (Med.) The condition or state of being free from fever. [ 1913 Webster ]

a. (Med.) Efficacious in preventing or allaying fever. -- n. A febrifuge. [ 1913 Webster ]

n. (Med.) An artificial alkaloid, believed to be efficient in abating fever. [ 1913 Webster ]

a. (Med.) Good against burns or pyrosis. -- n. Anything of use in preventing or healing burns or pyrosis. [ 1913 Webster ]

a. [ Pref. a&unr_; not + pyretic. ] (Med.) Without fever; -- applied to days when there is an intermission of fever. Dunglison. [ 1913 Webster ]

a. (Med.) Relating to apyrexy. “Apyrexial period.” Brande & C. [ 1913 Webster ]

{ ‖ } n. [ NL. apyrexia, fr. Gr. &unr_;; 'a priv. + &unr_; to be feverish, fr. &unr_; fire: cf. F. apyrexie. ] (Med.) The absence or intermission of fever. [ 1913 Webster ]

a. [ Gr. &unr_;; 'a priv. + &unr_; fire. ] Incombustible; capable of sustaining a strong heat without alteration of form or properties. [ 1913 Webster ]

n. [ Arsenic + pyrite. ] (Min.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called arsenical pyrites and mispickel. [ 1913 Webster ]

a. [ Pref. bi- + pyramidal. ] Consisting of two pyramids placed base to base; having a pyramid at each of the extremities of a prism, as in quartz crystals. [ 1913 Webster ]

n. [ Gr. chalko`s brass + E. pyrite. So named from its color. ] (Min.) Copper pyrites, or yellow copper ore; a common ore of copper, containing copper, iron, and sulphur. It occurs massive and in tetragonal crystals of a bright brass yellow color. [ 1913 Webster ]

n. an editor who prepares text for publication.
Syn. -- copy editor, text editor. [ WordNet 1.5 ]

n. The right of an author or his assignee, under statute, to print and publish his literary or artistic work, exclusively of all other persons. This right may be had in maps, charts, engravings, plays, and musical compositions, as well as in books. [ 1913 Webster ]

☞ In the United States in 1913 a copyright was valid for the term of twenty-eight years, with right of renewal for fourteen years on certain conditions. The term was extended in stages, and in 1997 the term of a copyright was life plus 50 years for individuals retaining their copyright, or 75 years for works created for hire. Further extension is still (1998) being discussed. [ 1913 Webster +PJC ]

International copyright, an author's right in his productions as secured by treaty between nations. [ 1913 Webster ]

v. t. To secure a copyright on. [ 1913 Webster ]

n. [ Gr. di- = di`s- twice fire. ] (Min.) A mineral of the scapolite group; -- so called from the double effect of fire upon it, in fusing it, and rendering it phosphorescent. [ 1913 Webster ]

a. [ Pref. di- + pyrene. ] (Bot.) Containing two stones or nutlets. [ 1913 Webster ]

n. [ Pref. di- + pyridine. ] (Geom.) A polymeric form of pyridine, C10H10N2, obtained as a colorless oil by the action of sodium on pyridine. [ 1913 Webster ]

n. [ Pref. di- + pyridine + -yl. ] (Chem.) A crystalline nitrogenous base, C10H8N2, obtained by the reduction of pyridine. [ 1913 Webster ]

a. [ L. empyrius, empyreus, fiery, Gr. &unr_;, &unr_;, in fire, fiery; &unr_; in + &unr_; fire. See In, and Fire. ] Formed of pure fire or light; refined beyond aërial substance; pertaining to the highest and purest region of heaven. [ 1913 Webster ]

Go, soar with Plato to the empyreal sphere. Pope. [ 1913 Webster ]

Empyreal air, oxygen gas. [ 1913 Webster ]

n. Empyrean. Mrs. Browning. [ 1913 Webster ]

n. [ See Empyreal. ] The highest heaven, where the pure element of fire was supposed by the ancients to subsist. [ 1913 Webster ]

The empyrean rung
With hallelujahs. Milton. [ 1913 Webster ]

a. Empyreal. Akenside. [ 1913 Webster ]

‖n. [ NL., from Gr. &unr_; a live coal covered with ashes, fr. &unr_; to set on fire, fr. &unr_;: cf. F. empyreume. See Empyreal. ] (Chem.) The peculiar smell and taste arising from products of decomposition of animal or vegetable substances when burnt in close vessels.

{ } a. [ Cf. F. empyreumatique. ] Of or pertaining to empyreuma; as, an empyreumatic odor. [ 1913 Webster ]

Empyreumatic oils, oils obtained by distilling various organic substances at high temperatures. Brande & C. [ 1913 Webster ]

v. t. To render empyreumatic. [ R. ] [ 1913 Webster ]

a. [ Gr. &unr_; in fire. See Empyreal. ] Containing the combustible principle of coal. Kirwan. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_;; &unr_; in + &unr_; to burn. ] A general fire; a conflagration. [ Obs. ] Sir M. Hale. [ 1913 Webster ]

n. [ Gr. e'y^ well + &unr_; fire. ] A contrivance for obtaining a light instantaneously, such as a lucifer match. [ archaic ] Brande & C. [ 1913 Webster ]

prop. n. a genus of plants of the buckwheat family, including the buckwheat Fagopyrum esculentum; in some classifications included in the genus Polygonum.
Syn. -- genus Fagopyrum. [ WordNet 1.5 +PJC ]

‖n. [ NL. See Hyper-, and Pyrexia. ] (Med.) A condition of excessive fever; an elevation of temperature in a disease, in excess of the limit usually observed in that disease. [ 1913 Webster ]

prop. n. A natural family of insects comprising the fireflies.
Syn. -- family Lampyridae. [ WordNet 1.5 ]

n. [ See Lampyris. ] (Zool.) An insect of the genus Lampyris, or family Lampyridæ. See Lampyris. [ 1913 Webster ]

‖n. [ L., glowworm, Gr. (&unr_;). ] (Zool.) A genus of coleopterous insects, including the glowworms. [ 1913 Webster ]

n. [ Leuco- + pyrites. ] (Min.) A mineral of a color between white and steel-gray, with a metallic luster, and consisting chiefly of arsenic and iron. [ 1913 Webster ]

n. [ Macro- + pyramid. ] (Crystallog.) See Macroprism. [ 1913 Webster ]

{ } n. [ NL. Melampyrum cowwheat; Gr. me`las black + pyro`s wheat. ] (Chem.) The saccharine substance dulcite; -- so called because found in the leaves of cowwheat (Melampyrum). See Dulcite. [ 1913 Webster ]

a. [ Mono- + pyrene. ] (Bot.) Having but a single stone or kernel. [ 1913 Webster ]

a. [ L. papyraceus made of papyrus. ] Made of papyrus; of the consistency of paper; papery. [ 1913 Webster ]

a. Of or pertaining to papyrus, or to paper; papyraceous. [ 1913 Webster ]

n. [ Cf. F. papyrin made of paper. See Paper. ] Imitation parchment, made by soaking unsized paper in dilute sulphuric acid. [ 1913 Webster ]

n. [ Papyrus + -graph. ] An apparatus for multiplying writings, drawings, etc., in which a paper stencil, formed by writing or drawing with corrosive ink, is used. The word is also used of other means of multiplying copies of writings, drawings, etc. See Copygraph, Hectograph, Manifold. [ Obsolescent ] [ 1913 Webster +PJC ]

n. The process of multiplying copies of writings, etc., by means of the papyrograph. -- Pap`y*ro*graph"ic a. [1913 Webster]

n.; pl. Papyri [ L., fr. Gr. pa`pyros. See Paper. ] 1. (Bot.) A tall rushlike plant (Cyperus Papyrus) of the Sedge family, formerly growing in Egypt, and now found in Abyssinia, Syria, Sicily, etc. The stem is triangular and about an inch thick. [ 1913 Webster ]

2. The material upon which the ancient Egyptians wrote. It was formed by cutting the stem of the plant into thin longitudinal slices, which were gummed together and pressed. [ 1913 Webster ]

3. A manuscript written on papyrus; esp., pl., written scrolls made of papyrus; as, the papyri of Egypt or Herculaneum. [ 1913 Webster ]

{ }. [ Gr. &unr_;, &unr_;, fire. ] Combining forms designating fire or heat; specifically (Chem.), used to imply an actual or theoretical derivative by the action of heat; as in pyrophosphoric, pyrosulphuric, pyrotartaric, pyrotungstic, etc. [ 1913 Webster ]

n. [ Gr. &unr_; fire + &unr_; a thorn, prickly plant. ] (Bot.) The evergreen thorn (Cratægus Pyracantha), a shrub native of Europe. [ 1913 Webster ]

a. Of or pertaining to a pyre. [ R. ] [ 1913 Webster ]

n. [ L. pyralis, -idis, a kind of winged insect. ] (Zool.) Any moth of the family Pyralidæ. The species are numerous and mostly small, but some of them are very injurious, as the bee moth, meal moth, hop moth, and clover moth. [ 1913 Webster ]

n. [ L. pyramis, -idis, fr. Gr. &unr_;, &unr_;, of Egyptian origin: cf. F. pyramide. ] [ 1913 Webster ]

1. A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape. [ 1913 Webster ]

2. (Geom.) A solid figure contained by a plane rectilineal figure as base and several triangles which have a common vertex and whose bases are sides of the base. [ 1913 Webster ]

3. pl. (Billiards) The game of pool in which the balls are placed in the form of a triangle at spot. [ Eng. ] [ 1913 Webster ]

4. (Finance) a fraudulent investment scheme in which the manager promises high profits, but instead of investing the money in a genuine profit-making activity, uses the money from later investors to pay the profits to earlier investors; -- also called pyramid scheme or pyramid operation. This process inevitably collapses when insufficient new investors are available, leaving the later investors with total or near-total losses of their investments. The managers usually blame government regulations or interference for the collapse of the scheme, rather than admit fraud. [ PJC ]

Altitude of a pyramid (Geom.), the perpendicular distance from the vertex to the plane of the base. --
Axis of a pyramid (Geom.), a straight line drawn from the vertex to the center of the base. --
Earth pyramid. (Geol.) See Earth pillars, under Earth. --
Right pyramid (Geom.) a pyramid whose axis is perpendicular to the base. [ 1913 Webster ]