English Dictionary

watch glass

名詞

(chemistry) An item of glass laboratory equipment consisting of a simple, slightly concave circle of glass. It is a general utility item, used to hold small samples, to evaporate liquids, to cover a beaker, and so on.

日本語の意味

化学実験などで使用される、やや凹面を持つ円形のガラス器具。少量の試料保持、液体の蒸発、ビーカーの覆いとして用いられる。

Before heating the solution, gently place a few drops on the watch glass to observe any color change during evaporation.

溶液を加熱する前に、蒸発中の色の変化を観察するために、時計皿に数滴を優しく置いてください。

意味（1）

(chemistry) An item of glass laboratory equipment consisting of a simple, slightly concave circle of glass. It is a general utility item, used to hold small samples, to evaporate liquids, to cover a beaker, and so on.

意味（2）

The glass covering of the face of a watch.

意味（3）

A sandglass.

watch glasses （ plural ）