| cusp angle | The angle made by the slopes of a cusp with the plane which passes through the tip of the cusp and which is perpendicular to a line bisecting the cusp, measured mesiodistally or buccolingually, the angle made by the slopes of a cusp with a perpendicular line bisecting the cusp, measured mesiodistally or buccolingually, one-half of the included angle between the buccal and lingual or mesial and distal cusp inclines. (05 Mar 2000) |
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| anterior cusp of atrioventricular valve | The anterior leaflet or valvule of either the tricuspid or mitral valves. Synonym: cuspis anterior valvae atrioventricularis dextrae/sinistrae. (05 Mar 2000) |
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| apex of cusp of tooth | The tip of the peaklike projections from the crown of a tooth. Synonym: apex cuspidis dentis. (05 Mar 2000) |
| posterior cusp of atrioventricular valve | The posterior leaflet of either the tricuspid or mitral valves. Synonym: cuspis posterior valvae atrioventricularis dextrae/sinistrae. (05 Mar 2000) |
| cusp | A rigid, sharp point, especially on a leaf. (09 Oct 1997) |
| cusp height | The shortest distance between the tip of a cusp and its base plane, the shortest distance between the deepest part of the central fossa of a posterior tooth and a line connecting the points of the cusps of the tooth. Facial height, the linear dimension in the midline from the hairline to the menton. Nasal height, the distance between the nasion and the lower border of the nasal aperture. Orbital height, the distance between the midpoints of the upper and lower margins of the orbit. (05 Mar 2000) |
| cusp of Carabelli | A fifth cusp found on the maxillary first molars, usually located lingual to the mesiolingual cusp. (05 Mar 2000) |
| cusp of tooth | An elevation or mound on the crown of a tooth making up a part of the occlusal surface. Synonym: cuspis dentis, cuspis coronae. (05 Mar 2000) |
| semilunar cusp | One of the three semilunar segments serving as the three cusps of a valve preventing regurgitation at the beginning of the aorta; a similar valve guards the entrance of the pulmonary trunk; the segments are named, respectively, anterior, right, and left in the pulmonary valve, and posterior, right, and left in the aortic valve. (05 Mar 2000) |
| septal cusp of tricuspid valve | The leaflet of the tricuspid valve located adjacent to the interventricular septum. Synonym: cuspis septalis valvae atrioventricularis dextrae. (05 Mar 2000) |
| talon cusp | An anomalous cusp that projects lingually from the cingulum of permanent incisors. Origin: Eng. Claw, heel, fr. O. Fr., fr. L. Talus, ankle (05 Mar 2000) |
| acromial angle | The prominent angle at the junction of the posterior and lateral borders of the acromion. Synonym: angulus acromialis. (05 Mar 2000) |
| acute angle | Any angle less than 90 |
| acute angle closure glaucoma | <ophthalmology> An increase in pressure within the anterior chamber of the eye. There are two forms of glaucoma: acute angle closure and open angle glaucoma. (27 Sep 1997) |
| adjacent angle | An angle with a line in common with another angle. (05 Mar 2000) |
| alpha angle | The angle between the visual and optic axes as they cross at the nodal point of the eye, the angle between the visual line and the major axis of the corneal ellipse. (05 Mar 2000) |