ilmenite
plural of letter of comment
(mineralogy) A weakly magnetic dark gray mineral found in metamorphic and igneous rocks; it is a mixed oxide of iron and titanium, FeTiO₃
Misspelling of involucrin.
plural of præfix
地質学者は火山の露頭から磁気分析のためにチタン鉄鉱の試料を採取した。
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