Molar

In dentistry, a molar is one of the posterior teeth well adapted to grinding, in keeping with its origin from the Latin mola meaning millstone.

* * *

1. Denoting a grinding, abrading, or wearing away. [L. molaris, relating to a mill, millstone] 2. SYN: m. tooth. 3. Massive; relating to a mass; not molecular. [L. moles, mass] 4. Denoting a concentration of 1 gram-molecular weight (1 mol) of solute per liter of solution, the common unit of concentration in chemistry. Cf.:molal. 5. Denoting specific quantity, e.g., m. volume (volume of 1 mol).

- first m., first permanent m. sixth permanent tooth or fourth deciduous tooth in the maxilla and mandible on either side of the midsagittal plane of the head following the arch form.

- Moon molars small dome-shaped first m. teeth occurring in congenital syphilis.

- mulberry m. a m. tooth with alternating nonanatomical depressions and rounded enamel nodules on its crown surface, usually associated with congenital syphilis.

- second m. seventh permanent or fifth deciduous tooth in the maxilla and mandible on either side of the midsagittal plane of the head following the arch form.

- sixth-year m. the first permanent m. tooth.

- third m. SYN: third-year m. tooth.

- twelfth-year m. the second permanent m. tooth.

* * *

mo·lar 'mō-lər n a tooth with a rounded or flattened surface adapted for grinding specif one of the mammalian teeth behind the incisors and canines sometimes including the premolars but more exactly restricted to the three posterior pairs in each human jaw on each side which are not preceded by milk teeth

molar adj

1 a) pulverizing by friction <\molar teeth>

b) of, relating to, or located near the molar teeth <\molar gland>

2) of, relating to, possessing the qualities of, or characterized by a hydatidiform mole <\molar pregnancy>

molar adj

1) of or relating to a mass of matter as distinguished from the properties or motions of molecules or atoms

2) of or relating to larger units of behavior esp. as relatable to a prior deprivation or motivational pattern of the organism <interest in such \molar problems of personality as the ego functions (R. R. Holt)> compare MOLECULAR (2)

molar adj

1) of or relating to a mole of a substance <the \molar volume of a gas>

2) containing one mole of solute in one liter of solution

* * *

n.

in the permanent dentition, the sixth, seventh, or eighth tooth from the midline on each side in each jaw (see also wisdom tooth). Permanent molars do not replace primary teeth. In the primary dentition, molars are the fourth and fifth teeth from the midline on each side in each jaw.

* * *

mo·lar (M) (M) (moґlər) 1. pertaining to a mole of a substance, such as molar mass or molar absorptivity, i.e., the quantity of some property associated with a mole of the substance. 2. a measure of the concentration of a solute, expressed as the number of moles of solute per liter of solution, e.g., 0.25M = 0.25 mole per liter (mol/L). The latter notation is used in the SI system.