'Hexapoda' definitions:

Definition of 'Hexapoda'

noun

Insects; about five-sixths of all known animal species [syn: Insecta, class Insecta, Hexapoda, class Hexapoda]

From: GCIDE

Hexapoda \Hex*ap"o*da\, n. pl. [NL., fr. Gr. "e`x six + -poda.] (Zool.) The true, or six-legged, insects; insects other than myriapods and arachnids. [1913 Webster]
Note: The Hexapoda have the head, thorax, and abdomen differentiated, and are mostly winged. They have three pairs of mouth organs, viz., mandibles, maxill[ae], and the second maxill[ae] or labial palpi; three pairs of thoracic legs; and abdominal legs, which are present only in some of the lowest forms, and in the larval state of some of the higher ones. Many (the Metabola) undergo a complete metamorphosis, having larv[ae] (known as maggots, grubs, caterpillars) very unlike the adult, and pass through a quiescent pupa state in which no food is taken; others (the Hemimetabola) have larv[ae] much like the adult, expert in lacking wings, and an active pupa, in which rudimentary wings appear. See Insecta. The Hexapoda are divided into several orders. [1913 Webster]