1 [moh-ler]
Also called molar tooth. a tooth having a broad biting surface adapted for grinding, being one of twelve in humans, with three on each side of the upper and lower jaws. See illus. under tooth.
adapted for grinding, as teeth.
pertaining to such teeth.

1535–45; < Latin molāris grinder, short for (dēns) molāris grinding (tooth), equivalent to mol(a) millstone + -āris -ar1 Unabridged


2 [moh-ler]
Physics. pertaining to a body of matter as a whole, as contrasted with molecular and atomic.

1860–65; < Latin mōl(ēs) a mass + -ar1


3 [moh-ler]
adjective Chemistry.
pertaining to a solution containing one mole of solute per liter of solution.
noting or pertaining to gram-molecular weight.

1860–65; mole4 + -ar1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
molar1 (ˈməʊlə)
1.  any of the 12 broad-faced grinding teeth in man
2.  a corresponding tooth in other mammals
3.  of, relating to, or designating any of these teeth
4.  used for or capable of grinding
[C16: from Latin molāris for grinding, from mola millstone]

molar2 (ˈməʊlə)
1.  (of a physical quantity) per unit amount of substance: molar volume
2.  (not recommended in technical usage) (of a solution) containing one mole of solute per litre of solution
[C19: from Latin mōlēs a mass]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"grinding tooth," 1540s, from L. molaris dens "grinding tooth," from mola "millstone," from PIE base *mel- "to rub, grind" (see mill (1)).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

molar mo·lar1 (mō'lər)

  1. Relating to or being a solution that contains one mole of solute per liter of solution.

  2. Of, relating to, or characterizing the physical properties of a body of matter as a whole, especially the mass of a body, as opposed to the molecular or atomic properties.

  3. Abbr. M Of, relating to, or being a solution whose concentration is expressed as moles of solute per liter of solution.

  4. Containing one mole of a substance.

molar 2
A tooth having a crown with three, four, or five cusps on the grinding surface, a bifid root in the lower jaw, and three conical roots in the upper jaw. In permanent dentition, there are three on either side behind the premolars; in deciduous dentition, there are two on either side behind the canines. adj.

  1. Of or relating to the molars.

  2. Capable of grinding.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
molar 1   (mō'lər)  Pronunciation Key 
  1. Relating to a mole.

  2. Containing one mole of solute per liter of solution.

molar 2   (mō'lər)  Pronunciation Key 
Any of the teeth located toward the back of the jaws, having broad crowns for grinding food. Adult humans have 12 molars.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
And finally the process is repeated for the third molar, its papilla appearing
  about the fifth year of life.
The dental branches supply the molar and premolar teeth.
Two more chimpanzee teeth were later found at the site, an upper incisor and a
  tooth tentatively identified as a molar.
The height of the molar crowns increased, as did the number of enamel plates in
  the molars, and the tooth enamel thinned.
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