| prepotent | 1. Very powerful; superior in force, influence, or authority; predominant. 2. <biology> Characterised by prepotency. Origin: L. Praepotens. (05 Mar 1998) |
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| prepotential | A gradual rise in potential between action potentials as a phasic swing in electric activity of the cell membrane, which establishes its rate of automatic activity, as in the ureter or cardiac pacemaker. (05 Mar 2000) |