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racemic    
a. 外消旋的

外消旋的

Racemic \Ra*ce"mic\ (r[.a]*s[=e]"m[i^]k), a. [Cf. F.
rac['e]mique. See {Raceme}.] (Chem.)
Pertaining to, or designating, an acid found in many kinds of
grapes. It is also obtained from tartaric acid, with which it
is isomeric, and from sugar, gum, etc., by oxidation. It is a
sour white crystalline substance, consisting of a combination
of dextrorotatory and levorotatory tartaric acids. --Gregory.
[1913 Webster]

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