Source : Webster's Revised Unabridged Dictionary (1913)

Premolar \Pre*mo"lar\, a. (Anat.)
   Situated in front of the molar teeth. --n. An anterior molar
   tooth which has replaced a deciduous molar. See {Tooth}.

Source : WordNet®

premolar
     n : a tooth having two cusps or points; located between the
         incisors and the molars [syn: {bicuspid}]