Pyrethrin

Definition of Pyrethrin

Pyr´eth`rin
n.1.(Chem.) A substance resembling, and isomeric with, ordinary camphor, and extracted from the essential oil of feverfew; - called also Pyrethrum camphor.
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Pyoxanthose
Pyracanth
Pyral
Pyralid
Pyramid
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Pyramidal numbers
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Pyramidion
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Pyramis
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Pyrargyrite
Pyrazine
Pyre
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-Pyrethrin-
Pyrethrine
Pyretic
Pyretology
Pyrexia
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Pyrgom
Pyrheliometer
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Pyridine
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Pyritohedral
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