| 单词 | pyrethrin |
| 释义 | pyrethrin /puy ree"thrin, -reth"rin/, n. Chem. 1. Also called pyrethrin I. a viscous, water-insoluble liquid, C21H28O3, extracted from pyrethrum flowers, used as an insecticide. 2. Also called pyrethrin II. a like compound, C22H28O5, obtained and used similarly. [1830-40; PYRETHR(UM) + -IN2] |
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