tussock moth

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various usually dull-colored moths of the family Lymantriidae, the caterpillars of which have tufts of hair along the back and are often destructive to deciduous trees.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun dull-colored moth whose larvae have tufts of hair on the body and feed on the leaves of many deciduous trees