Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of numerous hemipteran insects of the family Pentatomidae, having a broad, flattened body and emitting a strong odor from glands in the abdomen.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Insects, usually shield-shaped, that possess a gland that produces a foul smelling liquid, usually containing aldehydes which they use to discourage predators.
  • noun entomology A common name applied to various insects of the Hemiptera order (the "true bugs"), in the Heteroptera suborder, principally in the superfamilies Pentatomoidea and Coreoidea.
  • noun A pinacate beetle or stink beetle (genus Eleodes) that releases a pungent odor when threatened.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

stink +‎ bug

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