Definitions for Insects
in·sects

WikipediaRate this definition:0.0 / 0 votes

1. insects

   Insects (from Latin insectum) are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Their blood is not totally contained in vessels; some circulates in an open cavity known as the haemocoel. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at between six and ten million; potentially over 90% of the animal life forms on Earth are insects. Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans, which recent research has indicated insects are nested within. Nearly all insects hatch from eggs. Insect growth is constrained by the inelastic exoskeleton and development involves a series of molts. The immature stages often differ from the adults in structure, habit and habitat, and can include a usually immobile pupal stage in those groups that undergo four-stage metamorphosis. Insects that undergo three-stage metamorphosis lack a pupal stage and adults develop through a series of nymphal stages. The higher level relationship of the insects is unclear. Fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm (22 to 28 in). The most diverse insect groups appear to have coevolved with flowering plants. Adult insects typically move about by walking, flying, or sometimes swimming. As it allows for rapid yet stable movement, many insects adopt a tripedal gait in which they walk with their legs touching the ground in alternating triangles, composed of the front and rear on one side with the middle on the other side. Insects are the only invertebrate group with members able to achieve sustained powered flight, and all flying insects derive from one common ancestor. Many insects spend at least part of their lives under water, with larval adaptations that include gills, and some adult insects are aquatic and have adaptations for swimming. Some species, such as water striders, are capable of walking on the surface of water. Insects are mostly solitary, but some, such as certain bees, ants and termites, are social and live in large, well-organized colonies. Some insects, such as earwigs, show maternal care, guarding their eggs and young. Insects can communicate with each other in a variety of ways. Male moths can sense the pheromones of female moths over great distances. Other species communicate with sounds: crickets stridulate, or rub their wings together, to attract a mate and repel other males. Lampyrid beetles communicate with light. Humans regard certain insects as pests, and attempt to control them using insecticides, and a host of other techniques. Some insects damage crops by feeding on sap, leaves, fruits, or wood. Some species are parasitic, and may vector diseases. Some insects perform complex ecological roles; blow-flies, for example, help consume carrion but also spread diseases. Insect pollinators are essential to the life cycle of many flowering plant species on which most organisms, including humans, are at least partly dependent; without them, the terrestrial portion of the biosphere would be devastated. Many insects are considered ecologically beneficial as predators and a few provide direct economic benefit. Silkworms produce silk and honey bees produce honey, and both have been domesticated by humans. Insects are consumed as food in 80% of the world's nations, by people in roughly 3000 ethnic groups. Human activities also have effects on insect biodiversity.

U.S. National Library of MedicineRate this definition:5.0 / 1 vote

1. Insects

   Insects are a class, Insecta, of Arthropoda whose members are characterized by division into three parts: head, thorax, and abdomen. They are the dominant group of animals on earth, several hundred thousand different kinds having been described. They have lived on earth for about 350 million years, as compared with less than 2 million for man. While insects are often commercially valuable and useful as scavengers, many species are harmful, causing enormous losses in agriculture and storage. Three orders, HEMIPTERA; DIPTERA; and Siphonaptera; are of medical interest in that they cause disease in man and animal. (From Dorland, 27th ed; Borror et al., An Introduction to the Study of Insects, 4th ed, p1)

Editors ContributionRate this definition:0.0 / 0 votes

1. insectsnoun

   Plural noun of the word insect.

   Insects are a vital part of the ecology on planet Earth so they are respected.

   
   

   Submitted by MaryC on April 22, 2016  

Anagrams for Insects »

1. sentics

How to pronounce Insects?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say Insects in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Insects in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of Insects in Pythagorean Numerology is: 8

Examples of Insects in a Sentence

1. Thomas Gremillion:

   If there was a big change in how animals are being fed, I'd want to see some extra scrutiny of whether the animals were accumulating any kinds of toxins from the insects.

2. Biyoo:

   As I looked outside I noticed a street light crowded by moths. But as soon as that light went off, the moths fled in search of light (they seemed inseparable). Apparently, insects (moths) that are attracted to light know something we don't ~ go figure.

3. Leah Bessa:

   Some insects, like the black solider fly larvae, have the ability to feed on a wide range of organic matter, for example, the spent grain left over from brewing beer is used to feed the larvae.

4. Dalip Monga:

   If the number of insects is eight to 10 per leaf, the attack is said to have crossed the ETL - or economic threshold level.

5. Chris Connolly:

   Small changes in the pesticide structure or its target site in insects are likely to be critical to risk assessment, each pesticide/insect combination needs to be considered independently.

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References

1. ^ Wikipedia
   https://en.wikipedia.org/wiki/Insects