单词 | knapweed |
释义 | knap·weed ![]() n. Any of various weedy thistlelike plants in the composite family having flowers grouped in a head with a spiny involucre, especially several species of the genus Centaurea and the Eurasian species Acroptilon repens. [Middle English knopwed : knop, knob; see KNOP + wed, weed; see WEED1.] |
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