| 释义 | naph·tha·lene·acetic acid \| ̷ ̷ ̷ ̷ˌ ̷ ̷+...-\ noun
 Etymology: naphthalene + acetic
 : either of two crystalline naphthyl derivatives C10H7CH2COOH of acetic acid; especially  : the alpha or 1-compound used as a growth regulator for plants (as for preventing drop of apples before normal harvest time)
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