1. a small arthropod animal that has six legs and generally one or two pairs of wings: "insect pests"
▪ any small invertebrate animal such as a spider or tick.
Word Originearly 17th century (originally denoting any small cold-blooded creature with a segmented body): from Latin (animal) insectum ‘segmented (animal)’ (translating Greek zōion entomon), from insecare ‘cut up or into’, from in- ‘into’ + secare ‘to cut’.