| quadroon | The offspring of a mulatto and a white person; a person quarter-blooded. Alternative forms: quarteron, quarteroon, and quateron. Origin: F. Quarteron, or Sp. Cuarteron. See Quarter a fourth part, and cf. Quarteron. Source: Websters Dictionary (01 Mar 1998) |
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| quadroxide | <chemistry> A tetroxide. Origin: Quadri- + oxide. Source: Websters Dictionary (01 Mar 1998) |
| quadrumana | <zoology> A division of the Primates comprising the apes and monkeys; so called because the hind foot is usually prehensile, and the great toe opposable somewhat like a thumb. Formerly the Quadrumana were considered an order distinct from the Bimana, which last included man alone. Origin: NL. See Quadrumane. Source: Websters Dictionary (01 Mar 1998) |
| quadrumane | <zoology> One of the Quadrumana. Origin: L. Quattuor four + manus a hand: cf. F. Quadrumane. Source: Websters Dictionary (01 Mar 1998) |
| quadrumanous | <zoology> Having four hands; of or pertaining to the Quadrumana. Source: Websters Dictionary (01 Mar 1998) |
| quadruped | <zoology> An animal having four feet, as most mammals and reptiles; often restricted to the mammals. Source: Websters Dictionary (01 Mar 1998) |
| quadrupedal | <zoology> Having four feet; of or pertaining to a quadruped. Source: Websters Dictionary (01 Mar 1998) |
| quadruple amputation | Amputation of both arms and both legs. (05 Mar 2000) |
| quadruple rhythm | A quadruple cadence to the heart sounds due to the easy audibility of both third and fourth heart sounds, indicative of serious myocardial disease. Synonym: trainwheel rhythm. (05 Mar 2000) |
| quadruplet | One of four children born at one birth. Synonym: quadrigeminus. Origin: L. Quadruplus, four fold (05 Mar 2000) |
| quadruplex | Fourfold; folded or doubled twice. <physics> Quadruplex system, a system by which four messages, two in each direction, may be sent simultaneously over the wire. Origin: L, from quattuor four + plicare to fold. Source: Websters Dictionary (01 Mar 1998) |
| quadruplicate | 1. Fourfold; doubled twice; four times repeated; as, a quadruplicate ratio, or a quadruplicate proportion. 2. <mathematics> Raised to the fourth power. Origin: L. Quadruplicatus, p. P. Source: Websters Dictionary (01 Mar 1998) |
| quagga | <zoology> A South African wild ass (Equus, or Hippotigris, quagga). The upper parts are reddish brown, becoming paler behind and behind and beneath, with dark stripes on the face, neck, and fore part of the body. Origin: Hottentot. Source: Websters Dictionary (01 Mar 1998) |
| quahaug | <zoology> An American market clam (Venus mercenaria). It is sold in large quantities, and is highly valued as food. Called also round clam, and hard clam. The name is also applied to other allied species, as Venus Mortoni of the Gulf of Mexico. Origin: Abbrev. Fr. Narragansett Indian poquauhock. Source: Websters Dictionary (01 Mar 1998) |
| quail | Small galliform bird. Quail embryos are often use in developmental studies because quail cells can be distinguished from chicken cells, yet the two are sufficiently closely related that it is possible to graft embryonic tissue from one to the other. (18 Nov 1997) |