One of the classes of Arthropoda, including people with one set of antennæ, three pairs of mouth body organs, and inhale environment in the shape of tracheæ, starting by spiracles along the sides of the human body. Inside feeling it includes the Hexapoda, or six-legged pests additionally the Myriapoda, with numerous feet. See insect, n.
In a far more limited feeling, the Hexapoda alone. See Hexapoda.
In the many basic good sense, the Hexapoda, Myriapoda, and Arachnoidea, combined.