好词典

molar

UK //ˈməʊ.lər//US //ˈmoʊ.lɚ//

词源

源自拉丁语 'molaris',意为'磨石',与动词 'molere'(研磨)相关。14世纪进入英语,最初指磨碎的谷物,后引申为研磨牙齿。化学意义始于19世纪。

noun

❶ 口腔后部用于咀嚼食物的牙齿,成年人类通常有12颗臼齿,包括智齿在内。

“The dentist said I need to have my molar extracted.”

(牙医说我需要拔掉这颗臼齿。)

“She bit into the apple with her back molars.”

(她用后臼齿咬了一口苹果。)

同义词:grinder, back tooth

adj

❶ 与摩尔量相关的化学术语,表示每升溶液中溶质的摩尔数。

“The molar concentration of the solution was 0.5 M.”

(该溶液的摩尔浓度为0.5M。)

“We need to calculate the molar mass of this compound.”

(我们需要计算这种化合物的摩尔质量。)

同义词:molecular

常见短语

molar tooth — 特指臼齿,强调牙齿的咀嚼功能和解剖位置。

“The tiger's molar teeth are adapted for tearing meat.”

(老虎的臼齿适合撕咬肉类。)

molar concentration — 化学术语,表示单位体积溶液中所含溶质的物质的量。

“The molar concentration of NaCl in seawater is about 0.6 M.”

(海水中氯化钠的摩尔浓度约为0.6M。)