| quad | <physics> Unit of energy equal to a Quadrillion BTUs (10^15) or roughly one exajoule. See: joule, exajoule, BTU. (09 Oct 1997) |
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| quadrable | <mathematics> That may be sqyared, or reduced to an equivalent square; said of a surface when the area limited by a curve can be exactly found, and expressed in a finite number of algebraic terms. See: Quadrate. Source: Websters Dictionary (01 Mar 1998) |
| quadragene | An indulgence of forty days, corresponding to the forty days of ancient canonical penance. Origin: LL. Quadragena, fr. L. Quadrageni forty each, akin to quadraginta forty. Source: Websters Dictionary (01 Mar 1998) |
| quadragesima | The forty days of fast preceding Easter; Lent. Quadragesima Sunday, the first Sunday in Lent, about forty days before Easter. Origin: L, fr. Quadragesimus the fortieth, fr. Quadraginta forty; akin to quattuor four. See Four. Source: Websters Dictionary (01 Mar 1998) |
| quadrangle | 1. <geometry> A plane figure having four angles, and consequently four sides; any figure having four angles. 2. A square or quadrangular space or inclosure, such a space or court surrounded by buildings, especially. Such a court in a college or public school in England. Origin: F, fr. L. Quadrangulum; quattuor four + angulus an angle. See Four, and Angle a corner. Source: Websters Dictionary (01 Mar 1998) |
| quadrangular | Having four angles. Origin: L. Quadrangularis, fr. Quadrangulum, quadrangle (05 Mar 2000) |
| quadrangular cartilage | A thin cartilaginous plate located between vomer, perpendicular plate of the ethmoid, and nasal bones, and completing the nasal septum anteriorly. Synonym: cartilago septi nasi, cartilage of nasal septum, cartilaginous septum, pars cartilaginea septi nasi, quadrangular cartilage, septal cartilage. (05 Mar 2000) |
| quadrangular lobule | The main portion of the superior part of each hemisphere of the cerebellum, corresponding to the monticulus of the vermis; it is divided into two portions, the anterior and the posterior crescentic lobules, corresponding to the culmen and the declive of the vermis. Synonym: lobulus quadrangularis, lobus quadratus, lobulus quadratus, quadrate lobe, quadrate lobule. (05 Mar 2000) |
| quadrangular membrane | The elastic fibra membrane that extends from the ventricular fold of the larynx upward to the aryepiglottic fold; it attaches anteriorly to the epiglottis and posteriorly to the lateral margin of the arytenoid and corniculate cartilages. Synonym: membrana quadrangularis, Tourtual's membrane. (05 Mar 2000) |
| quadrangular space | Musculotendinous formation providing passageway for the axillary nerve, posterior humeral circumflex artery and accompanying veins as they run from the axilla to the superior posterior arm; as the neurovascular structures enter the formation anteriorly, it is bounded superiorly by the shoulder joint, medially by the lateral border of subscapularis, laterally by the surgical neck of the humerus, and inferiorly by the tendon of latissimus dorsi; as the vessels exit the formation posteriorly, it is bounded superiorly by the teres minor, medially by the long head of the triceps, laterally by the lateral head of the triceps and inferiorly by the teres major muscle or tendon; as they emerge, most of the neurovascular structures run on the deep surface of the deltoid muscle, which they supply. Synonym: quadrilateral space. (05 Mar 2000) |
| quadrangular therapy | Marriage therapy involving the husband and wife and their respective therapists. (05 Mar 2000) |
| quadrant | <dentistry> The four parts of your mouth, that is the upper left, the upper right, the lower left, and the lower right. (08 Jan 1998) |
| quadrantal | 1. A cubical vessel containing a Roman cubic foot, each side being a Roman square foot; used as a measure. 2. A cube. Origin: L. <geometry> Of or pertaining to a quadrant; also, included in the fourth part of a circle; as, quadrantal space. Quadrantal triangle, a spherical triangle having one side equal to a quadrant or arc of 90 deg . Quadrantal versor, a versor that expresses rotation through one right angle. Origin: L. Quadrantalis containing the fourth fourth part of a measure. Source: Websters Dictionary (01 Mar 1998) |
| quadrantanopia | Loss of vision in a quarter section of the visual field of one or both eyes; if bilateral, it may be homonymous or heteronymous, binasal or bitemporal, or crossed, e.g., involving the upper quadrant in one eye and the lower quadrant in the other. Synonym: quadrantic hemianopia. (05 Mar 2000) |
| quadrantic hemianopia | Loss of vision in a quarter section of the visual field of one or both eyes; if bilateral, it may be homonymous or heteronymous, binasal or bitemporal, or crossed, e.g., involving the upper quadrant in one eye and the lower quadrant in the other. Synonym: quadrantic hemianopia. (05 Mar 2000) |