Nearby Words

Allethrins

[al-uh-thrin]

al·le·thrin

[al-uh-thrin]
noun Chemistry.
a clear, amber, viscous liquid, C19H26O3, used as an insecticide.

Origin:
1945–50; all(yl) + (pyr)ethrin, equivalent to Pyrethr(um) name of a genus of composite plants + -in2
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Allethrins is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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