quadrennium (kwodrenium)

[For quad riennium, q. v.] A period of four years. Burdening girls, after they leave school, with a quad rennium of masculine college regimen. E. H. Clarke , Sex in Education, p. 125. quadrature (kwod'ra-tur), n. [ = F. quadra- ture = Sp. cuadratura = Pg. It. quadratura , a . LL. quadratura , a making square, a squaring, quadrare , pp. quadratus , square: see quad- rate.] 1. In geom., the act of squaring an area; the finding of a square or several squares equal in area to a given surface.-2. A quadrate; a square space. [Rare.] IMG:content-1414.png:[blocks in formation] 3. The relative position of two planets, or of a longitudes is 90°. But when armillæ were employed to observe the moon in other situations a second inequality was discov ered, which was connected, not with the anomalistical, but with the synodical revolution of the moon, disappearing in conjunctions and oppositions, and coming to its greatest amount in quadratures. What was most perplexing about this second inequality was that it did not return in every quadrature, but, though in some it amounted to 2° 39', in other quadratures it totally disap peared. Small, Account of the Astronomical Discoveries [of Kepler (London, 1804), § 11. Neptune... is in quadrature with the sun on the 23d. Sci . Amer ., N. S., LVII. 64. 4. A side of a square. [Rare.] This citie [Cambalu] is foure square, so that euery quad rature or syde of the wall hath in it thre principal portes or gates. R. Eden , tr. of Sebastian Munster (First Books [on America, ed. Arber, р. 25). Indefinite quadrature, a rule for the quadrature of the circle, applicable to any sector of it. - Mechanical quadrature, an approximate quadrature of a plane surface, effected by the division of it by parallel lines into parts so small that they may be regarded as rectilinear or other quadrable figures; also, the integration of any expre ion by an analogous method. - Method of quadratures, the approximate integration of an expre ion between given numerical limits by the summation of parts in each of which the difference between the limits is so small that the integral is practically equal to that of some integrable expre ion. The problem of the quadrature, or the quadrature of the circle, the problem of squaring the circle, of which there are two varieties: first, the arithmetical quadrature, exactly to expre in square measure the area of a circle whose radius is some exact number in long measure; second, the geometrical quadrature, to describe or draw with the rule and compa es alone a square equal in area to a given circle. Both problems have been proved to be insoluble. quadratus (kwod-rā'tus), n.; pl. quadrat i (-tī). [NL., sc. musculus, the square muscle: see quadrate.] In zoöl. and an at., the musculus quadratus or quadrate muscle of (a) the femur; (b) the loins; (c) the chin; (d) the nictitating membrane. See quadrate muscle, under quad rate.-Quadratus femoris, a muscle situated at the back of the hip-joint, arising from the tuberosity of the ischium and inserted into a line running from the posterior inter trochanteric ridge. Quadratus labii inferior is. Same as depre or labii inferior is (which see, under depres sor). - Quadratus labii superior is, the combined leva tor labii superior is alæque nas i, levator labii superior is ent proprius, parts being and zygomatic us called caput minor angulare, muscles, caput the infra orbit ale, three differ and caput zygomaticum respectively. - Quadratus lumborum. See lumbus. - Quadratus ment i. See mentum. quadrauricular (kwod-ra-rik'ū-lär), a. [ quadrel (kwod'rel), n. [ 2. A piece of turf or peat cut in a square form. [Prov. Eng.] quadrelle (kwod-rel′), n. [ quadrennial (kwod-ren'i-al), a. and n. [For quadriennial, q. v.] I. a. 1. Comprising four years: as, a quadrennial period.-2. Occurring once in four years: as, quadrennial elections. Both States [Montana and Washington] provide for a quadrennial election of a governor, lieutenant-governor, secretary of state, state treasurer, state auditor, attorney general, and superintendent of public instruction. The Century , XXXIX. 506. L. quattuor ( quadri- ), = E. four, + articulatus, pp. of articulare, divide into single joints: see articulate.] Having four articulations or joints. quadribasic (kwod-ri-bā'sik), a. [ Sir Isaac Newton had discovered a way of attaining the quantity of all quadrible curves analytically, by his method of fluxions, some time before the year 1688. Derham , Physico-Theol., v. 1, note y. quadric (kwod'rik), n. and a. [ II. a . In alg . and geom ., of the second degree; quadratic. Where there is only one variable, the word quadratic is usually employed; in plane geometry, conic ; and in solid geometry and where the number of non-homogeneous variables exceeds two, quadric . Thus, we say quadric cone, not quadratic or conic cone. - Quadric inversion. See inversion. - Quadric surface, a surface of the second order. quadricapsular (kwod-ri-kap'sū-lär), a. [ quadric a rin ate (kwod-ri-kar'i-nāt), a. [ quadricentennial (kwod"ri-sen-ten'i-al), a.and n. [ II. n . The commemoration or celebration of an event which occurred four hundred years before: as, the Luther quadricentennial . quadriceps (kwod'ri-seps), n . [NL., quat tuor ( quadri- ), = E. four, + caput, head: see biceps.] In an at., the quadriceps extensor cruris of the thigh; the great muscle which extends the leg upon the thigh, considered as consisting of the rectus, cruræus, and vast us intern us and extern us. Called triceps extensor cruris when the cruræus is regarded as a part of the vast us in tern us, or when the rectus is separately enumerated. This great muscle forms nearly all the flesh upon the front of the thigh. See cuts under muscle1.- Quadriceps suræ, the combined gastrocnemius extern us and intern us, soleus, and plantar is, forming the bulk of the muscle of the IMG:content-1415.png:[blocks in formation] IMG:content-1416.png:[blocks in formation] Quadricorn Sheep ( Ovis aries , var. quadric ornis). + cornu = E. horn.] I. a. Having four horns or horn-like parts, as antennæ; quadric or no us. II. n. A quadricorn animal.