| aperture, effective | <microscopy> The diameter of the entrance pupil: it is the apparent diameter of the limiting aperture measured from the front. (05 Aug 1998) |
|---|---|
| apetalous | <botany> Without petals. (09 Oct 1997) |
| apex | <dentistry> The very bottom of the root of your tooth. (08 Jan 1998) |
| apex auriculae | A point projecting upward and posteriorly from the free outcurved margin of the helix a little posterior to its upper end. Synonym: apex auriculae, apex satyri, Woolner's tip. (05 Mar 2000) |
| apex beat | The visible and/or palpable pulsation made by the apex of the left ventricle as it strikes the chest wall in systole; normally in the fifth intercostal space, about 10 cm to the left of the median line. (05 Mar 2000) |
| apex capitis fibulae | The pointed upper end of the fibular head to which is attached the arcuate popliteal ligament and part of the biceps femoris tendon. Synonym: apex capitis fibulae, styloid process of fibula. (05 Mar 2000) |
| apex cartilaginis arytenoideae | The pointed upper end of the cartilage which supports the corniculate cartilage and the aryepiglottic fold. Synonym: apex cartilaginis arytenoideae. (05 Mar 2000) |
| apex cordis | The blunt extremity of the heart formed by the left ventricle. See: apex beat. Synonym: apex cordis, vertex cordis. (05 Mar 2000) |
| apex cornus posterioris | The pointed extremity of each posterior gray column or cornu of the spinal cord. Synonym: apex cornus posterioris, caput cornus, tip of posterior horn. (05 Mar 2000) |
| apex cuspidis dentis | The tip of the peaklike projections from the crown of a tooth. Synonym: apex cuspidis dentis. (05 Mar 2000) |
| apex dentis | The tip of the dens of the axis to which is attached the apical ligament of the dens. Synonym: apex dentis. (05 Mar 2000) |
| apex impulse | Conventionally the lowermost, leftmost area of cardiac pulsation that is usually palpable. (05 Mar 2000) |
| apex linguae | The anterior extreme of the tongue which can be made pointed for sensing or probing and which rests against the lingual aspect of the incisor teeth. Synonym: apex linguae. (05 Mar 2000) |
| apex nasi | Anteriormost pointed end of external nose. Synonym: apex nasi. (05 Mar 2000) |
| APEX nuclease | <enzyme> DNA repair enzyme having both exonuclease and apurinic-apyrimidinic endonuclease activities; apex is from mouse; rapen from rat has high homology with apex Registry number: EC 3.1.- Synonym: rapen redox factor (26 Jun 1999) |