tornado siren
centrifugation at low temperature
(archaic) Alternative form of congee: a leavetaking, a farewell, in various senses; a bow, a curtsey, or similar gestures whether or not used for taking leave.
(organic chemistry) The hydrolysis of a lactone
A type of air raid siren used to warn of impending tornados.
竜巻警報サイレンが鳴ったとき、皆は避難壕へ急いだ。
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