The Collaborative International Dictionary of English v.0.48:

Molar \Mo"lar\, a. [L. molaris, fr. mola mill, fr. molere to
   grind in a mill. See Mill the machine.]
   Having power to grind; grinding; as, the molar teeth; also,
   of or pertaining to the molar teeth. --Bacon.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Molar \Mo"lar\, n. (Anat.)
   Any one of the teeth back of the incisors and canines. The
   molars which replace the deciduous or milk teeth are
   designated as premolars, and those which are not preceded
   by deciduous teeth are sometimes called true molars. See
   Tooth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

molar \mo"lar\ (m[=o]"l[~e]r), a. [L. moles mass.] (Mech.)
   Of or pertaining to a mass of matter; -- said of the
   properties or motions of masses, as distinguished from those
   of molecules or atoms.
   [PJC]

The Collaborative International Dictionary of English v.0.48:

molar \mo"lar\ (m[=o]"l[~e]r or m[=o]"l[aum]r), a. [L. moles
   mass.] (Chem.)
   Being at a concentration having the designated number of
   moles (of solute) per liter of solvent; as, an 0.2 molar
   solution of sodium chloride in water is close to isotonic.
   [PJC]

WordNet (r) 3.0 (2006):

molar
    adj 1: of or pertaining to the grinding teeth in the back of a
           mammal's mouth; "molar teeth"
    2: designating a solution containing one mole of solute per
       liter of solution
    3: containing one mole of a substance; "molar weight"
    4: pertaining to large units of behavior; "such molar problems
       of personality as the ego functions"--R.R. Hunt [ant:
       molecular(a)]
    n 1: grinding tooth with a broad crown; located behind the
         premolars [syn: molar, grinder]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "molar":
   baby tooth, bicuspid, bucktooth, canine, crown, cuspid, cutter,
   deciduous tooth, dent, dental, denticle, denticulation, dentiform,
   dentil, dentition, dentoid, dogtooth, eyetooth, fang, fanged,
   fore tooth, gagtooth, gang tooth, gold tooth, grinder, incisor,
   milk tooth, odontoid, peg, permanent tooth, pivot tooth, premolar,
   scrivello, snag, snaggle-toothed, snaggled, snaggletooth, tooth,
   toothed, toothlike, toothy, tush, tusk, tusked, wisdom tooth