| aftermovement | Involuntary arm abduction that follows sustained isometric contraction of the deltoid and supraspinatus muscles (usually performed by pushing the upper extremity forcibly and against an immovable vertical surface while standing closely beside it). Synonym: Kohnstamm's phenomenon. (05 Mar 2000) |
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| afterpains | <medicine> The pains which succeed childbirth, as in expelling the afterbirth. Source: Websters Dictionary (01 Mar 1998) |
| afterperception | Subjective persistance of a stimulus after its cessation. Compare: palinopsia. (05 Mar 2000) |
| afterpotential | The small change in electrical potential in a stimulated nerve that follows the main, or spike, potential; it consists of an initial negative deflection followed by a positive deflection in the oscillograph record. (05 Mar 2000) |
| aftersensation | Subjective persistance of sensation after cessation of stimulus. Synonym: afterimpression. (05 Mar 2000) |
| aftershaft | <zoology> The hypoptilum. Source: Websters Dictionary (01 Mar 1998) |
| aftersound | Subjective persistance of an auditory stimulus after cessation of the stimulus. (05 Mar 2000) |
| aftertaste | Subjective persistance of a gustatory stimulus after contact with the stimulating substance has ceased. (05 Mar 2000) |
| aftertouch | Persistence of tactile sensation after cessation of the stimulus. (05 Mar 2000) |
| aftosa | Synonym: foot-and-mouth disease. Origin: Sp. Fiebre aftosa, aphthous fever (05 Mar 2000) |
| afunctional occlusion | A malocclusion which does not permit normal function of the dentition. (05 Mar 2000) |