any small air-breathing arthropod of the class Insecta, having a body divided into head, thorax, and abdomen, three pairs of legs, and (in most species) two pairs of wings. Insects comprise about five sixths of all known animal species, with a total of over one million named speciesRelated: entomic
2.
(loosely) any similar invertebrate, such as a spider, tick, or centipede
3.
a contemptible, loathsome, or insignificant person
Related: entomic
[C17: from Latin insectum (animal that has been) cut into, insect, from insecāre, from in-² + secāre to cut; translation of Greek entomon insect]