Insect /(ĭn"sĕkt)/

In·sect

Insect

n.
  1. One of the Insecta; esp., one of the Hexapoda. See Insecta. (Zool.)
  2. Any air-breathing arthropod, as a spider or scorpion. (Zool.)
  3. Any small crustacean. In a wider sense, the word is often loosely applied to various small invertebrates. (Zool.)
  4. Fig.: Any small, trivial, or contemptible person or thing.

Phrases & Compounds
Insect powder
a powder used for the extermination of insects; esp., the powdered flowers of certain species of Pyrethrum, a genus now merged in Chrysanthemum. Called also Persian powder.

Insect

a.
  1. Of or pertaining to an insect or insects.
  2. Like an insect; small; mean; ephemeral.