Meaning of BUG in English

BUG

True bugs are insects of the suborder Heteroptera (order Hemiptera). They are wingless or four-winged, with mouthparts adapted for piercing and sucking. The term bug is sometimes used to refer to any insect or similar organisms such as centipedes and mites.

English glossary of entomology and crop protection.      Английский глоссарий энтомологии и защиты растений.