Definition of "Molar" :

noun: grinding tooth with a broad crown; located behind the premolars

adjective: pertaining to large units of behavior

"Such molar problems of personality as the ego functions."

adjective: containing one mole of a substance

"Molar weight."

adjective: designating a solution containing one mole of solute per liter of solution

adjective: of or pertaining to the grinding teeth in the back of a mammal's mouth

"Molar teeth."