| 释义 |
Definition of rotenone in English: rotenonenoun ˈrəʊtənəʊnˈrōtnˌōn mass nounChemistry A toxic crystalline substance obtained from the roots of derris and related plants, widely used as an insecticide. A polycyclic ketone; chemical formula: C₂₃H₂₂O₆ Example sentencesExamples - A good dusting of rotenone is effective, as is hand-picking, or giving the bush a good, hard shake.
- Use insecticidal soap sprays or rotenone to kill this pest.
- A hard spray of water will knock some bugs off the plants and a dusting of a non-toxic substance called rotenone shuts off their breathing mechanism.
- Found commonly in a number of wild plants, rotenone makes it impossible for the fish to use oxygen.
- By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
Origin 1920s: from Japanese rotenon (from roten 'derris') + -one. Definition of rotenone in US English: rotenonenounˈrōtnˌōn Chemistry A toxic crystalline substance obtained from the roots of derris and related plants, widely used as an insecticide. A polycyclic ketone; chemical formula: C₂₃H₂₂O₆ Example sentencesExamples - A hard spray of water will knock some bugs off the plants and a dusting of a non-toxic substance called rotenone shuts off their breathing mechanism.
- Use insecticidal soap sprays or rotenone to kill this pest.
- Found commonly in a number of wild plants, rotenone makes it impossible for the fish to use oxygen.
- A good dusting of rotenone is effective, as is hand-picking, or giving the bush a good, hard shake.
- By the mid 1800s, the heads of chrysanthemum flowers were used to obtain pyrethrum, and rotenone was extracted from the derris plant.
Origin 1920s: from Japanese rotenon (from roten ‘derris’) + -one. |