| angular vein | <anatomy, vein> A short vein at the medial angle of the eye, formed by the supraorbital and supratrochlear veins's and continuing as the facial vein. Synonym: vena angularis. (05 Mar 2000) |
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| angular | 1. Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as, an angular figure. 2. Measured by an angle; as, angular distance. 3. Lean; lank; raw-boned; ungraceful; sharp and stiff in character; as, remarkably angular in his habits and appearance; an angular female. Angular aperture, Angular distance. See Aperture, Distance. Angular motion, the motion of a body about a fixed point or fixed axis, as of a planet or pendulum. It is equal to the angle passed over at the point or axis by a line drawn to the body. Angular point, the point at which the sides of the angle meet; the vertex. Angular velocity, the ratio of anuglar motion to the time employed in describing. Origin: L. Angularis, fr. Angulus angle, corner. See Angle. <anatomy> A bone in the base of the lower jaw of many birds, reptiles, and fishes. Source: Websters Dictionary (01 Mar 1998) |
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| angular acceleration | The rate of change of angular velocity; e.g., when a centrifuge rotor is speeding up, or when there is a simultaneous change in velocity and direction, as in an aircraft in a tight spin. (05 Mar 2000) |
| angular aldehyde | The aldehyde group attached to carbon 13 (between rings C and D) of the steroid nucleus in aldosterone. (05 Mar 2000) |
| angular aperture | The angle, in air, of light that passes from the object to the ends of the diameter of the front lens of the microscope objective. (05 Mar 2000) |
| angular artery | <anatomy, artery> The terminal branch of the facial artery; distribution, muscles and skin of side of nose; anastomoses, lateral nasal, and dorsal artery of nose and palpebrals from the ophthalmic artery, thereby providing an external-internal carotid arterial anastomosis. Synonym: artery of angular gyrus. Synonym: arteria angularis. (05 Mar 2000) |
| angular cheilitis | Inflammation and fissuring radiating from the commissures of the mouth secondary to predisposing factors such as lost vertical dimension in denture wearers, nutritional deficiencies, atopic dermatitis, or Candida albicans infection. Synonym: angular stomatitis, commissural cheilitis, perleche. (05 Mar 2000) |
| angular conjunctivitis | A subacute bilateral conjunctival inflammation sometimes caused by the Moraxella bacillus, marked by redness of the lateral canthi and scanty, stringy discharge that adheres to the lashes. Synonym: Moraxella conjunctivitis. (05 Mar 2000) |
| angular convolution | angular gyrus |
| angular curvature | A gibbous deformity, i.e., a sharp angulation of the spine, occurring in Pott's disease. Synonym: Pott's curvature. (05 Mar 2000) |
| angular methyl | A methyl group attached to carbon 10 (between rings A and B) or to carbon 13 (between rings C and D) of the steroid nucleus. (05 Mar 2000) |
| angular momentum | <physics> Momentum involved in the rotation of a body about an axis, conserved as is ordinary momentum (see momentum). Angular momentum is defined as the cross product of ordinary momentum with the position vector running from the axis of rotation to the body whose angular momentum is being determined. Torque is the rate of change of angular momentum with time. (12 Nov 1997) |
| angular notch | A sharp angular depression in the lesser curvature of the stomach at the junction of the body with the pyloric canal. Synonym: incisura angularis, sulcus angularis. (05 Mar 2000) |
| angular spine | A posterior and downward projection from the greater wing of the sphenoid bone on either side, located posterolateral to the foramen spinosum, so-named for its proximity to the sphenoidal spine; gives attachment to the sphenomandibular ligament. Synonym: processus spinosus, spina ossis sphenoidalis, alar spine, angular spine, spina angularis, spinous process. (05 Mar 2000) |
| angular stomatitis | Inflammation and fissuring radiating from the commissures of the mouth secondary to predisposing factors such as lost vertical dimension in denture wearers, nutritional deficiencies, atopic dermatitis, or Candida albicans infection. Synonym: angular stomatitis, commissural cheilitis, perleche. (05 Mar 2000) |
| aperture, angular | <microscopy> The angle between the most divergent rays that can pass through a lens to form the image of an object. The angle subtended between the axis of a lens and the largest accepted angle of the image-forming rays. With microscope objectives the trigonometric sine of this angle is used to define numerical aperture but as measured from the axial object point. (05 Aug 1998) |