An insect is a small animal that has six legs. Most insects have wings. Ants, flies, butterflies, and beetles are all insects. a small creature such as a fly or ant, that has six legs, and sometimes wings (insectum, from insecare ; because insects have a body in separate parts). Any member of the class Insecta, the largest arthropod class, including nearly 1 million known species (about three-fourths of all animals) and an estimated 5-10 million undescribed species. Insect bodies have three segments: head, thorax (which bears three pairs of legs and usually two pairs of wings), and many-segmented abdomen. Many species undergo complete metamorphosis. There are two subclasses: Apterygota (primitive, wingless forms, including silverfish and bristletails) and Pterygota (more advanced, winged or secondarily wingless forms). The approximately 27 orders of Pterygota are generally classified by wing form: e.g., Coleoptera (beetles), Diptera (dipterans), Heteroptera (bugs). Insects are found in almost all terrestrial and freshwater and some marine habitats
The largest CLASS of ARTHROPODS An insect's body is divided into three parts: head; THORAX and ABDOMEN Three pairs of jointed legs are borne on the thorax, which is the location in many insects for a pair of wings There are an estimated
anything which is small and is a self-contained entity and can 'get' into something and has abundance Eg bits in soap powder, microbacteria, cells, atoms, dust, spores, germs
{i} member of a group of very small invertebrate animals having segmented bodies and three pairs of legs, bug; very small animal which resembles an insect (i.e. spider); unimportant person
Relatively small and simple animals that have a rigid external skeleton, three body sections, three pairs of legs, and antennae These organisms are the most abundant group of eukaryotes on the Earth
n Any small, air-breathing arthropod of the class Insecta, which contains organisms that in the adult form normally have six legs, three distinct body regions (head, thorax, abdomen), one pair of antennae and one or two pairs of wings