| vertex corneae | The central part of the cornea, slightly thinner than the peripheral part. Synonym: vertex corneae. (05 Mar 2000) |
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| vertex | 1. <anatomy> A turning point; the principal or highest point; top; summit; crown; apex. Specifically: the top, or crown, of the head. 2. <astronomy> The zenith, or the point of the heavens directly overhead. 3. <mathematics> The point in any figure opposite to, and farthest from, the base; the terminating point of some particular line or lines in a figure or a curve; the top, or the point opposite the base. Vertex of a curve, the point in which the axis pierces the surface. The principal vertex of a conic section is, in the parabola, the vertex of the axis of the curve: in the ellipse, either extremity of either axis, but usually the left-hand vertex of the transverse axis; in the hyperbola, either vertex, but usually the right-hand vertex of the transverse axis. Origin: L. Vertex, -icis, a whirl, top of the head, top, summit, from vertere to turn. See Verse, and cf. Vortex. (29 Oct 1998) |
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| vertex cordis | The blunt extremity of the heart formed by the left ventricle. See: apex beat. Synonym: apex cordis, vertex cordis. (05 Mar 2000) |
| vertex of cornea | The central part of the cornea, slightly thinner than the peripheral part. Synonym: vertex corneae. (05 Mar 2000) |
| vertex presentation | See: cephalic presentation. (05 Mar 2000) |
| presentation, vertex | In a vertex presentation, the top of the baby's head comes first at delivery. The vertex here refers specifically to the top of the head the word vertex in latin means a whirlpool, whirlwind, top of the mountain, or the top of the head. Why top of the head ? because the hairs on the top of the head often form a whorl, a whirl-like pattern. (12 Dec 1998) |
| submental vertex projection | Radiographic projection devised to obtain direct visualization of the base of the skull. Synonym: axial view, base projection, submental vertex projection, submentovertical projection, verticosubmental view. (05 Mar 2000) |
| submental vertex radiograph | A radiographic projection showing the base of the skull, positions of the mandibular condyles, and zygomatic arches. Synonym: base view, submental vertex radiograph. (05 Mar 2000) |
| delivery, vertex | In a vertex delivery, the top of the baby's head comes first. The vertex here refers to the top of the head The word vertex in Latin means a whirlpool, whirlwind, top of the mountain, or the top of the head. Why top of the head ? Because the hairs on the top of the head often form a whorl, a whirl-like pattern. (12 Dec 1998) |
| macula corneae | A moderately dense opacity of the cornea. Synonym: corneal spot. (05 Mar 2000) |
| herpes corneae | <ophthalmology, pathology> Inflammation of the cornea (and conjunctiva) due to herpes virus type I, a characteristic finding on physical examination of the eye (cornea) is a dendritic pattern (crystalline or tree-like pattern). (27 Sep 1997) |
| substantia propria corneae | Proper substance of cornea, modified transparent connective tissue, between the layers of which are open spaces or lacunae nearly filled with the corneal cells or corpuscles. Synonym: substantia propria corneae. (05 Mar 2000) |
| ichthyosis corneae | An ocular complication of a congenital abnormality of the skin with corneal keratinization, dryness, and scaling. (05 Mar 2000) |
| epithelium anterius corneae | The stratified squamous epithelium covering the outer surface of the cornea; it is smooth, consists usually of five layers of cells, and contains numerous free nerve endings. Synonym: epithelium anterius corneae. (05 Mar 2000) |
| facies anterior corneae | The external surface of the cornea. Synonym: facies anterior corneae. (05 Mar 2000) |
| facies posterior corneae | The posterior surface of the cornea. Synonym: facies posterior corneae. (05 Mar 2000) |