orgyia

from The Century Dictionary.

• noun An ancient Greek measure of length, equivalent to about 6 feet.
• noun [capitalized] A genus of arctiid moths of the restricted family Liparidæ, the males of which fly by day with a vaporing kind of motion, and hence are called vaporers or vaporer-moths.

from the GNU version of the Collaborative International Dictionary of English.

• proper noun (Zoöl.) A genus of bombycid moths whose caterpillars (esp. those of Orgyia leucostigma) are often very injurious to fruit trees and shade trees. The female is wingless. Called also vaporer moth.