Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.


see pupapupa
, name for the third stage in the life of an insect that undergoes complete metamorphosis, i.e., develops from the egg through the larva and the pupa stages to the adult.
..... Click the link for more information.



the protective formation of the pupae of many insects. The cocoon is usually woven of silk thread secreted by the larva before pupation. Cocoons of this type are those of many butterflies that spin cocoons, moths, silkworms, and some ants, whose cocoons are mistakenly called ant eggs. Many beetle larvae, such as weevils of the genus Cionus, construct cocoons of mucus secreted at the time of pupation. In some insects, pupation occurs inside the casing in which the larva has lived, for example, the sac casings of bagworm moths. The pseudo-cocoons, or puparia, of many flies consist of the skins of the larvae left after molting.

Earthworms, leeches, spiders, and some mollusks form “egg cocoons,” inside which eggs develop.

What does it mean when you dream about a cocoon?

Cocoons represent a place of safety, healing, or transformation. Dreaming of a cocoon may be a response to a sense of feeling overburdened with life issues and the consequent longing for relief. Such a dream may indicate a place where the consciousness can restore and re-create new paths of expression, or perhaps the birth of a new aspect of the self.


(invertebrate zoology)
A protective case formed by the larvae of many insects, in which they pass the pupa stage.
Any of the various protective egg cases formed by invertebrates.


a. a silky protective envelope secreted by silkworms and certain other insect larvae, in which the pupae develop
b. a similar covering for the eggs of the spider, earthworm, etc.
2. a protective spray covering used as a seal on machinery
References in periodicals archive ?
These instars as well as instars C and D are completed within the cocoon in Grammostola pulchripes (Simon 1891).
These cocoons are relatively new and he took to it straight away.
Recently, Cocoon has integrated with Amazon Alexa, and Echo devices, which means you can your voice to control the system or ask for information about your home.
The cocoon scenario can explain the radio light curve of GW170817 as well as the gamma rays and XAaAaAeAe-rays.
You are coming to Liverpool next weekend with Cocoon, tell me how your relationship with the brand started?
The pupa is covered within a thick, oval, white or yellow silken case called cocoon.
Cocoon yield per 100 worms reared in each replication was calculated to get cocoon yield.
The Cocoon Resort is in Induruwa, an idyllic village a mile inland from the inviting unspoilt beaches of Sri Lanka's south coast, a 10-minute tuk-tuk ride from watersports centre Bentota.
The collaborative program has generated a NurOwn therapy-specific cassette that is employed as a disposable cartridge within the standard Cocoon platform, along with a dedicated software program to deliver and track the NurOwn process.
Using laparoscope, we found that small bowel was covered with a dense whitish fibrous sheath, which gave the appearance of a cocoon.