The adult emerges by either splitting the pupal Cocooning definition, the comforting self-care practice of staying in and spending time at home rather than going out to socialize, especially enjoying quiet or sedentary leisure activities or entertainment: After the excitement and activity of the holidays, I look forward to cocooning … Sericulture is the process of cultivating silkworms and extracting silk from them. Direct development occurs in the cocoon with no larval stages. The caterpillars of the domestic silkmoth (also called ‘Bombyx mori’) are the most commonly used silkworm species in sericulture. co•coon. A cocoon is a casing spun of silk by many moths and caterpillars, and numerous other holometabolous insect larvae as a protective covering for the pupa.. Cocoons may be tough or soft, opaque or translucent, solid or meshlike, of various colors, or composed of multiple … Related terms: ... Join Macmillan Dictionary on Twitter and Facebook for daily word facts, quizzes and language news. cocoon Case or wrapping produced by larval forms of animals (such as some moths, butterflies, and wasps) for the resting or pupal stage in their life cycle. b. Cocoon definition: A cocoon is a covering of silky threads that the larvae of moths and other insects make... | Meaning, pronunciation, translations and examples cocoon: (kə-ko͞on′) n. a. Pronunciation: (ku-kn'), [key] — n. the silky envelope spun by the larvae of many insects, as silkworms, serving as a covering while they are in the pupal stage. Some spiders spin a cocoon that protects their eggs. Three varieties of glands are present in the epidermis of clitellar segments, i.e., 14 th, 15 th and 16 th segments. In sexually reproducing organisms, males have organs that produce male gametes, usually sperm. Chrysalis and cocoon are two physical objects that are made in the same phase of a butterfly or moth's life, however, a chrysalis refers to the casing that a butterfly makes when it transforms, whereas a cocoon is a woven case made by a moth during this stage to protect itself. During pupation, larval structures break down, and adult structures such as wings appear for the first time. A similar natural protective covering or structure, such as the egg case of a spider. The zygote undergoes holoblastic and a modified spiral cleavage resulting in a hollow ball of cells, the blastula, enclosed in a vitelline membrane. A hermaphrodite is an organism with both male and female genitalia. noun verb topics explore cocoon -noun See definition in Dictionary biology cover that insect larvae make around themselves. Pupa, life stage in the development of insects exhibiting complete metamorphosis that occurs between the larval and adult stages (imago). Females have different sexual organs that produce female gametes, usually called eggs. Cocoon formation in Earthworm: Fertilization only occurs in the cocoon or ootheca and is always external. A protective case of silk or similar fibrous material spun by the larvae of moths and certain other insects as a cover for the pupa. After maturation of ovaries, cocoon or ootheca formation starts after copulation. Most cocoons are made of silk, and those of the domestic silkworm provide most of the world's commercial silk. Cocoon also contains albuminous substances secreted by the glands of the clitellum for the nourishment of the embryo. cocoon. 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