Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to ecdysis: instar


n. pl. ec·dy·ses (-sēz′)
The shedding of an outer integument or layer of skin, as by insects, crustaceans, and snakes; molting.

[Greek ekdusis, a stripping off, from ekduein, to take off : ek-, out, off; see ecto- + duein, to put on.]


n, pl -ses (-ˌsiːz)
(Zoology) the periodic shedding of the cuticle in insects and other arthropods or the outer epidermal layer in reptiles. See also ecdysone
[C19: New Latin, from Greek ekdusis, from ekduein to strip, from ek- ex-1 + duein to put on]
ecˈdysial adj


(ˈɛk də sɪs)

n., pl. -ses (-ˌsiz)
the shedding or casting off of an outer coat or integument by snakes, crustaceans, etc.
[1850–55; < Greek ékdysis=ekdý(ein) to strip off (ek- ec- + dýein to cause to enter) + -sis -sis]
ec•dys′i•al (-ˈdɪz i əl, -ˈdɪʒ əl) adj.


the process of shedding skin or other covering, typical of snakes and some insects. Cf. endysis.ecdysial, adj.
See also: Biology


The molting of the exoskeleton of arthropods.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ecdysis - periodic shedding of the cuticle in arthropods or the outer skin in reptilesecdysis - periodic shedding of the cuticle in arthropods or the outer skin in reptiles
shedding, sloughing - the process whereby something is shed
References in periodicals archive ?
These neurons appear transiently during the adult ecdysis starting from the mid-pupal stage (Selcho et al., 2018).
The final ecdysis is termed the pubertal molt, and it results in a major change in the morphology of the female abdomen that provides greater surface area for brooding eggs (Kennedy & Cronin 2007b).
Lower temperature levels were not observed in the rest of the study experiment, during which we observed sequences of ecdysis processes.
For second instars, these data were taken from the d they ecdysed (observed exuviae) into second instars (4-6 h after ecdysis) and then every d for a total of 8 d.
The larva are vermiform, apodic and, after ecdysis, only move after the hardening of the chitin.
eridania that feed on peach leaves or apple fruits, may be related to poor nutritional quality and the presence of allelochemicals, as observed in annual crops, which mostly affect ecdysis, preventing them from reaching the pupal stage (Reynolds et al., 1984).
It remains at this site feeding and undergoing several ecdysis until emerging as a male or female adult (EISENBACK & TRIANTAPHYLLOU, 1991; MOENS et al., 2009).
The phytochemical study (Table 1) facilitated identification of the secondary compounds in the different organic fractions of the nettle-fatigue and their probable actions on the cabbage-caterpillar, like decrease in mobility, larval growth and development, decline in pupal weight, pupal non-viability, morphological alterations in the wings, defective pupae, differences in pupal size, larval mortality, extension of the phase and incubation period, as well as incomplete ecdysis in the larval and pupal phases.
Newly emerging pathologists who are spreading their wings, residents and fellows maturing in their training ecdysis, and aspiring candidate caterpillars preparing to enter the profession, not to mention the training programs and the academic and private pathology communities, can all take some comfort from the current snapshot of the past 5 years.
Incomplete ecdysis syndrome in adult males of Cryphiops caementarius (Crustacea: Palaemonidae) and its consequences in intensive culture