Definition of melolonthid in US English:

melolonthid

adjective

Entomology
  • Of, relating to, or designating a chafer (beetle) of the family Melolonthidae (now regarded as the subfamily Melolonthinae, family Scarabaeidae).

noun

Entomology
  • A chafer (beetle) of the family Melolonthidae.

Origin

Early 20th century; earliest use found in Ibis: a quarterly journal of ornithology. From scientific Latin Melolonthidae, former family name (W. S. MacLeay Horae Entomologicae I. 80, replacing earlier Melolonthadae attributed to W. E. Leach) from Melolontha + -idae.

Pronunciation

melolonthid

/ˌmɛlə(ʊ)ˈlɒnθɪd/