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pyrethrin

/paɪˈriːθrɪn/ /pɪˈriːθrɪn/

Meanings
noun
Any of a number of naturally occurring insecticides extracted from the pyrethrum plant; unusual in having a cyclopropane ring.

Examples :

"The gardener sprayed pyrethrin on the roses to kill the aphids. "
compound substance chemistry agriculture insect plant science biology nature environment

Related Words

Illustration naturally

naturally adverb

/ˈnætʃ(ə)ɹəli/

In a natural manner.

"Although he was unused to the situation, he tried to act naturally."

Illustration sprayed

sprayed verb

/spɹeɪd/

To project a liquid in a dispersive manner toward something.

"The firemen sprayed the house."

Illustration occurring

occurring verb

/əˈkɜːɹɪŋ/ /əˈkɝɪŋ/

To happen or take place.

"The liftoff will occur in exactly twelve seconds."

Illustration gardener

gardener noun

/ˈɡɑːdnə/ /ˈɡɑɹdnɚ/

One who gardens; one who grows plants or cultivates a garden.

""Ponder the fact that God has made you a gardener, to root out vice and to plant virtue." — St. Catherine of Siena"

Illustration having

having verb

/ˈhævɪŋ/

To possess, own.

"I have a house and a car."

Illustration cyclopropane

cyclopropane noun

/ˌsaɪkloʊˈproʊpeɪn/

The simplest alicyclic hydrocarbon, C3H6, an inflammable gas, sometimes used as an anaesthetic.

"Because of its anesthetic properties, cyclopropane was once used in hospitals to help patients during surgery, but its flammability made it a risky choice. "

Illustration extracted

extracted verb

/ɛkˈstɹæktɪd/

To draw out; to pull out; to remove forcibly from a fixed position, as by traction or suction, etc.

"to extract a tooth from its socket, a stump from the earth, or a splinter from the finger"

Illustration pyrethrum

pyrethrum noun

/paɪˈɹiθɹəm/

Any of several daisy-like perennial African plants of the genus Tanacetum, especially Tanacetum cinerariifolium.

"My grandmother grows pyrethrum in her garden for its beautiful flowers and natural insecticidal properties. "

Illustration insecticides

insecticides noun

/ɪnˈsɛktɪsaɪdz/

A substance used to kill insects.

"Farmers use insecticides to protect their crops from being eaten by bugs. "

Illustration unusual

unusual noun

/ʌnˈjuːʒuəl/

Something that is unusual; an anomaly.

"The student's sudden absence was an unusual for her. "

Illustration number

number noun

/ˈnʌmbə/ /ˈnʌmbɚ/ /ˈnʌmə/ /ˈnʌmɚ/

An abstract entity used to describe quantity.

"Zero, one, −1, 2.5, and pi are all numbers."

Illustration aphids

aphids noun

/ˈeɪfɪdz/

Sapsucking pest insect of the superfamily Aphidoidea; an aphidian.

"The roses in the garden are covered in tiny green aphids that are sucking the sap from the leaves. "