potash alum
Picea sitchensis, a very large coniferous evergreen tree.
A surname.
alum, hydrated potassium aluminium sulphate, formula K₂SO₄.Al₂(SO₄)₃.24H₂O
simple past tense and past participle of pollard
化学者は結晶成長の実演のために、少量のミョウバン(硫酸カリウム・硫酸アルミニウムの水和物、式 K₂SO₄·Al₂(SO₄)₃·24H₂O)を水に溶かした。
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