单词 | derris |
释义 | derris/ˈdɛrɪs /noun 1 [mass noun] An insecticide containing rotenone, made from the powdered roots of certain tropical plants.This consisted of picking off the mature caterpillars and feeding them to the hens, and a liberal application of derris powder....
2A woody climbing plant of the pea family, which has tuberous roots from which the insecticide derris is obtained.
OriginMid 19th century (in sense 2): modern Latin (genus name), from Greek, 'leather covering' (referring to the plant's leathery pods). Rhymes |
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