Glossary terms beginning with U

Unguis

cf. Claw - the final segment in the leg of an insect.

Uniramia

the subphylum within the Arthropoda that contains insect, centipedes, millipedes.
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Univoltine

a species having one brood per year.
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Uric acid

a waste substance excreted by insects and many other terrestrial animals.
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Urticating hairs

defensive hairs possessed by some arachnids and insects that cause itching and irritation in mammals.
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