苦く土ど

noun

magnesia; magnesium oxide

Technical term for magnesium oxide, used in chemistry, agriculture, and industry. Often seen in compound words like 苦土石灰 (magnesium lime).

See also: 酸化マグネシウム

• 苦く土どは肥ひ料りょうの成せい分ぶんとして使つかわれる。

  Magnesia is used as a component of fertilizer.

• 苦く土ど石せっ灰かいを畑はたけにまく。

  Spread magnesium lime on the field.