pyrethrum

pyrethrum Definition

py·reth·rum (pī ret̸h′rəm, -rē′t̸hrəm)

noun

a perennial plant (Chrysanthemum coccineum) of the composite family, widely grown for the white, pink, red, or purple flower heads
an insecticide made from the dried flower heads of several Old World chrysanthemums, esp. a species (Chrysanthemum cinerariaefolium) now grown extensively in the U.S.

Etymology: ModL < L < Gr pyrethron, feverfew < pyr, fire

pyrethrum Usage Examples

Converse of object

base: If they are completely infested, we feel that the only safe product to use is a pyrethrum based powder.

Adjective modifier

natural: They have a similar activity to the natural compound pyrethrum, which is extracted from plants of the Chrysanthemum family.

Modifies a noun

ingredient: Can be used in the automatic aerosol dispensers for control of Flies in roof voids ( natural and safe pyrethrum ingredient ).

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