
any of a group of moths (order Lepidoptera), the common name for which is derived from the hair tufts, or tussocks, found on most larval forms. The ... [2 related articles]
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http://www.britannica.com/eb/a-z/t/95

The tussock moth (Dasychira pudibunda) is an insect whose larva is sometimes destructive to hops. The caterpillar is green, with transverse black markings and has tufts, or tussocks of hair on most of the segments. The moth is of a greyish colour, and is about two centimetres long.
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http://www.probertencyclopaedia.com/browse/BT.HTM

any of several moths of the family Lymantriidae, the larvae of which have characteristic tufts of hair on the body and feed on the leaves of various deciduous trees.
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https://www.infoplease.com/dictionary/tussock-moth
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