Definitions for Pyrethrum

• Definition
• Anagrams (239)

Pyrethrum py·re·thrum

Spelling: [pahy-ree-thruh m, -reth-ruh m]

IPA: /paɪˈri θrəm, -ˈrɛθ rəm/

Pyrethrum is a 9 letter English word. It's valid Words with friends word worth 20 points.

You can make 239 anagrams from letters in Pyrethrum (ehmprrtuy).

Definitions for Pyrethrum

noun

1. any of several chrysanthemums, as Chrysanthemum coccineum, having finely divided leaves and showy red, pink, lilac, or white flowers, cultivated as an ornamental.
2. any of several chrysanthemums, as C. cinerariifolium, or C. coccineum, cultivated as a source of insecticides.
3. Pharmacology. the dried flower heads of these plants, used chiefly as an insecticide and sometimes in medicine for certain skin disorders.

Origin of Pyrethrum

1555-65; Latin: pellitory Greek pýrethron, akin to pyretós fever; compare pellitory

Examples for Pyrethrum

Still, to anyone with but a slight knowledge of hardy plants, it asserts itself at once as a pyrethrum.

Sialagogues, as mercury internally, and pyrethrum externally.

After the plants begin to head, pyrethrum or salt water may be used.

How anything can be gay with pyrethrum uliginosum I cannot imagine.

pyrethrum is used as a spray, mixing one ounce to two gallons of water, to destroy cabbage-worms and many other garden insects.

In the Feverfew (pyrethrum), the receptacle is elevated, and the fruit is crowned with a narrow membrane.

pyrethrum or buhach may be used in similar manner, and kerosene emulsion has been highly recommended by some experimenters.

Prof. Riley states that the insects are very readily destroyed by pyrethrum.

After the cabbage has headed, it is very difficult to destroy the worm, but pyrethrum insect powder used freely is helpful.

Previous experience with pyrethrum was not very satisfactory.