n. a large grinding tooth at the back of the mouth. In the permanent *dentition, the sixth, seventh, and eighth teeth 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. Molars commonly have two or three roots.
a defect involving a deficiency in the mineralization of permanent first molar and incisor teeth during their maturation phase, thought to be due to a disturbance of development around the time of birth. It often presents in discolouration (yellow, brown, cream, or white depending on severity) and results in the affected teeth being more susceptible to decay.... molar–incisor hypomineralization
n. the strength of a solution, expressed as the weight of dissolved substance in grams per litre divided by its molecular weight, i.e. the number of moles per litre. Molarity is indicated as 0.1 M, 1 M, 2 M, etc.... molarity