molar

molar (mo´lar)

1. Denoting a grinding, abrading, or wearing away. [L. molaris, relating to a mill, millstone] 2. molar 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's m.'s 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. eighth permanent tooth in the maxilla and mandible on each side, making it the most posterior tooth in human dentition; usually erupts between the seventeenth and twenty-third years; the roots are often fused, the separation being marked only by grooves; because it tends to erupt in an anterosuperior direction, the lower third molar often becomes impacted against the lower second molar; it is common for one or more third molar to fail to develop.dens serotinus [NA], molaris tertius, dens sapientiae, wisdom tooth;
twelfth-year m. the second permanent m. tooth.

 

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