I. “+ adjective
Etymology: pre- + molar
: situated in front of or preceding the molar teeth ; usually : being or relating to those teeth of a mammal in front of the true molars and behind the canines when the latter are present
II. noun
1. : a premolar tooth that is in man one of two in each side of each jaw — called also bicuspid
2. : a milk tooth that occupies the position later taken by a premolar tooth of the permanent dentition