insect

noun

in·​sect ˈin-ˌsekt 

1

a

: any of a class (Insecta) of arthropods (such as bugs or bees) with well-defined head, thorax, and abdomen, only three pairs of legs, and typically one or two pairs of wings

b

: any of numerous small invertebrate animals (such as spiders or centipedes) that are more or less obviously segmented

—not used technically

2

: a trivial or contemptible person

insect adjective

Illustration of insect

• 1 labial palpus
• 2 maxillary palpus
• 3 simple eye
• 4 antenna
• 5 compound eye
• 6 prothorax
• 7 tympanum
• 8 wing
• 9 ovipositor
• 10 spiracles
• 11 abdomen
• 12 metathorax
• 13 mesothorax

Did you know?

The bodies of insects have segments, or divisions, so they appear to have a series of notches cut into them. This led the Greek philosopher Aristotle to give insects the name entomon “a thing cut into.” Entomon comes from the prefix en- “in,” combined with the verb temnein “to cut.” Later, when the Romans wanted a word for this kind of creature, they did not simply borrow the Greek word. Instead they translated it with the Latin word insectum, from the verb insecare “to cut into.” Insectum was borrowed into English as insect.

Synonyms

• cipher
• dwarf
• half-pint
• insignificancy
• lightweight
• morsel
• nobody
• nonentity
• nothing
• nullity
• number
• pip-squeak
• pygmy
• pigmy
• shrimp
• snippersnapper
• twerp
• whippersnapper
• zero
• zilch

Examples of insect in a Sentence

a swarm of flying insects

the magazine's editor in chief was notorious for treating staffers as insects, often not even bothering to learn their names

Recent Examples on the Web

Late-blooming flowers are a must-have for any garden that supports migrating songbirds and insects gearing up for winter. —Kristin Guy, Sunset Magazine, 24 Oct. 2024

These birds help maintain the natural balance by feeding on rodents, reptiles, insects and other prey. —Erika I. Ritchie, Orange County Register, 21 Oct. 2024

Brian was taking us nymphing, a form of fly-fishing that utilizes microscopic lures that mimic aquatic insects at a juvenile or larval stage. —John Paul Brammer, SELF, 17 Oct. 2024

This is one of the several differences between spiders and insects. —Jake Parks, Discover Magazine, 14 Oct. 2024

Word History

Etymology

Latin insectum, from neuter of insectus, past participle of insecare to cut into, from in- + secare to cut — more at saw

First Known Use

1601, in the meaning defined at sense 1b

Phrases Containing insect

• cochineal insect
• scale insect
• social insect
• spittle insect
• stick insect

Kids Definition

insect

noun

in·​sect ˈin-ˌsekt 

1

: any of numerous small invertebrate animals (as spiders or centipedes) that are more or less obviously made up of segments

—not used technically

2

: any of a class of arthropods (as butterflies, true bugs, two-winged flies, bees, and grasshoppers) with the body clearly divided into a head, thorax, and abdomen, with three pairs of jointed legs, and usually with one or two pairs of wings

Etymology

from Latin insectum "insect," derived from insecare "to cut into," from in- "in" and secare "to cut" — related to dissect, section

Word Origin

The bodies of insects have segments, or divisions. Thus they seem to have a series of notches cut into them. This appearance led the Greek philosopher Aristotle to give insects the name entomon "a thing cut into." Entomon comes from the prefix en- "in," combined with the verb temnein "to cut." Later, when the Romans wanted a word for this kind of creature, they did not simply borrow the Greek word. Instead they translated it into the Latin word insectum, from the verb insecare "to cut into." Insectum was borrowed into English as insect.

Medical Definition

insect

noun

in·​sect ˈin-ˌsekt 

: any arthropod of the class Insecta

insect adjective