wheel bug
noun
an assassin bug, Arilus cristatus, that has a toothed, semicircular crest on the pronotum and preys on other insects.
Origin of wheel bug
An Americanism dating back to 1805–15
Words nearby wheel bug
British Dictionary definitions for wheel bug
wheel bug
noun
a large predatory North American heteropterous insect, Arilus cristatus, having a semicircular thoracic projection: family Reduviidae (assassin bugs)