Explore Words Kanji Grammar Guides

Copyright © 2026 Kotomora. All Rights Reserved.

Get the Kotomora apps for iOS and Android.

Explore Words Kanji Grammar Guides About Support Privacy

Copyright © 2026 Kotomora. All Rights Reserved.

菱苦土石 (ryoukudoseki) Japanese meaning: magnesite | Kotomora

菱りょう苦く土ど石せき

りょ

う

く

ど

せ

き

Meanings

1

A mineral composed of magnesium carbonate (MgCO₃), used as a refractory material and a source of magnesium.

See also: マグネサイト

菱りょう苦く土ど石せきは耐たい火かレンガの原げん料りょう

と

し

て

使つか

わ

れる

。

Magnesite is used as a raw material for refractory bricks.

Kanji

菱diamond (shape), water chestnut, rhombus
苦suffering, trial, worry
土soil, earth, ground
石stone

Related words

マグネサイト
Katakana loanword for magnesite, commonly used in scientific and industrial contexts. 菱苦土石 is the native kanji term, more formal and less common in everyday speech.

Etymology

Compound of 菱 (rhombus, referring to the crystal shape), 苦土 (magnesia, an older term for magnesium oxide), and 石 (stone). The exact historical derivation is uncertain, but the spelling is conventionally associated with the mineral magnesite.