anhydrite
(mineralogy) An evaporite mineral made of anhydrous calcium sulfate.
(idiomatic, US) Absent from work due to an illness.
plural of spectroheliogram
A coin minted for use as a prize in geocaching, sometimes trackable on the Internet by its serial number.
コア採取中、チームは周囲の岩石の透水性を変化させた無水硫酸カルシウムの脈を発見した。
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