molar

Concise Oxford English Dictionary © 2008 Oxford University Press:
molar1 (also molar tooth)

▶noun a grinding tooth at the back of a mammal's mouth.

– origin ME: from L. molaris, from mola ‘millstone’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
molar2

▶adjective acting on or by means of large masses or units.

– origin C19: from L. moles ‘mass’ + -ar1.

Concise Oxford English Dictionary © 2008 Oxford University Press:
molar3

▶adjective Chemistry relating to one mole of a substance.

■ (of a solution) containing one mole of solute per litre of solvent.

– derivatives
molarity noun.