eggarPronunciation: /ˈɛgə/Definition of eggar noun a large brownish moth which is often active during the day. Many species in the family Lasiocampidae, including the oak eggar (L. quercus) Origin: early 18th century: probably from egg1 (from the shape of the caterpillar's cocoon) + -er1eggar in other Oxford dictionaries Definition of eggar in the US English dictionary
