a. [ L. praepollens, p. p. of praepollere to surpass in power; prae before + pollere to be powerful. ] Having superior influence or power; prevailing; predominant. [ R. ] Boyle. [ 1913 Webster ]

‖n.; pl. Prepollices [ NL. See Pre-, Pollex. ] (Anat.) An extra first digit, or rudiment of a digit, on the preaxial side of the pollex. [ 1913 Webster ]