Translation guide
The English word "molar" can refer to a type of tooth or to a unit of concentration in chemistry. These two meanings are completely distinct and have different Japanese equivalents.
Referring to the large, flat teeth at the back of the mouth used for grinding food.
The standard anatomical term for a molar tooth. Used in medical and everyday contexts.
奥の臼歯が痛みます。
My back molar hurts.
臼歯は食べ物をすりつぶす役割があります。
Molars have the role of grinding food.
Literally "back tooth," a common everyday term for molars. Less formal than 臼歯.
奥歯でしっかり噛んでください。
Please chew firmly with your back teeth.
Specifically refers to the larger molars (first, second, and third molars). Used in dentistry.
第一大臼歯は6歳頃に生えてきます。
The first molar erupts around age 6.
Referring to molar concentration (moles per liter), often used in chemistry.
The standard term for molar concentration. Often abbreviated as M.
この溶液のモル濃度を計算してください。
Please calculate the molar concentration of this solution.
1モル濃度の塩酸を用意する。
Prepare 1 molar hydrochloric acid.
Short for モル濃度, used in informal lab speech. Can also mean 'mole' (the unit of amount of substance), so context matters.
0.5モルの溶液を作って。
Make a 0.5 molar solution.
While both refer to molars, 臼歯 is the anatomical term and can be used in formal contexts. 奥歯 is more colloquial and literally means 'back tooth,' which may include premolars in casual speech. For precise dental discussions, use 臼歯.
In chemistry, モル濃度 is the full term for molarity. モル alone can be ambiguous because it also means 'mole' (the unit). In spoken lab Japanese, モル is often used for molar concentration when the context is clear, but in writing, モル濃度 is preferred.