ichneumon wasp

noun
variants: or less commonly ichneumon fly

Definition of ichneumon wasp 

: any of a large family (Ichneumonidae) of brown or black hymenopterous insects that have a slender body and long ovipositor and whose larvae are parasites of the larvae and pupae of various insects

First Known Use of ichneumon wasp

1671, in the meaning defined above

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The first known use of ichneumon wasp was in 1671

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