prepollent adjective 1noun 1forms 1 adjective1 •Having superior influence or power; prevailing; predominant.But the prepollent Gravity of some, being sufficient to give comparative Lightness or Gravity to Bodies, we must deny Nature this Prerogative. — 1686 noun1 •An extra first digit, or rudiment of a digit, on the preaxial side of the pollex. formsprepollents