A molar is one of the large teeth at the back of the mouth, made for grinding food, not for cutting it. The front teeth bite a piece off; the molars crush it.

A molar臼齒 is是 one of the large teeth at the back of the mouth嘴巴後面的大牙齒之一, made for grinding food是用來磨碎食物的, not for cutting it不是用來切的。The front teeth前面的牙齒 bite a piece off咬下一塊; the molars臼齒 crush it把它磨碎。

Adults can have twelve if all of them come in — three on each side, top and bottom. Though actually the last ones are wisdom teeth, and many people never get a full set, or they have them taken out.

Adults成年人 can have twelve如果全部長出來的話可以有十二顆 if all of them come in — three on each side, top and bottom上下左右每邊三顆。Though actually不過其實 the last ones最後那幾顆 are wisdom teeth是智齒, and而 many people很多人 never get a full set從來沒有長齊, or they have them taken out或是把它們拔掉了。

As an adjective, molar can mean “of those teeth”: a molar cavity, a molar extraction. The name comes from a Latin word for millstone, because these teeth crush like a mill.

As an adjective當形容詞用時, molar「molar」 can mean可以指 "of those teeth"「那些牙齒的」: a molar cavity臼齒的蛀洞, a molar extraction臼齒的拔除。The name這個名字 comes from源自 a Latin word for millstone拉丁文裡指「磨石」的字, because因為 these teeth crush like a mill這些牙齒磨東西的方式像磨坊一樣。

Chemistry class has another word that only looks the same. That molar belongs to the mole, the chemist’s counting unit for atoms. You meet molar mass and molar concentration.

Chemistry class化學課 has another word有另一個詞 that only looks the same只是看起來一樣。That molar那個 molar belongs to屬於 the mole「莫耳」, the chemist's counting unit for atoms化學家用來計算原子數量的單位。You你 meet molar mass and molar concentration會遇到 molar mass（莫耳質量）和 molar concentration（莫耳濃度）。

These two molars did not start as one idea. In the dentist’s chair, molar is a tooth.

These two molars這兩個 molar did not start as one idea一開始並不是同一個概念。In the dentist's chair在牙醫的診療椅上, molar「molar」 is a tooth指的是牙齒。