astr

abbr. 天文学（astronomy）

any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior

(astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases

n an abnormal deficiency or absence of free hydrochloric acid in the gastric juice

n absence of gastric juices (partial or complete)

See Astringent.

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