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allegretto
allegro
allele
allelo-
allelochemical
allelomorph
allelopathy
allelotoxin
alleluia
allemande
Allen
Allen key
Allen screw
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allene
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allethrin
al·le·thrin [ állə thrìn ]


noun 
Definition:
 
insecticide: a clear or amber-colored viscous liquid. Use: insecticide. C19H26O3
[Mid-20th century. Blend of allyl + pyrethrin]
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