eversible


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eversible

(of structures) being capable of protruding from an organism by being turned inside out. Examples include the eversible proboscis in some worms, and the eversible cloaca in some birds that can be protruded to form a penis-like structure used in copulation.
References in periodicals archive ?
35); base of eversible membrane with short but conspicuous ventromedial lobe and two very short lateroventral lobes (rudimentary ventral taeniae) (Fig.
annae described by Babenko (1994), but is distinguished by the darker body colour, the presence of eversible sac and having 7 dorsal sensilla setae on Ant.
In fact, asymmetry of the eversible vesica is nearly universal in Lepidoptera (Chapman 1902) and appears associated with asymmetry in the female internal genitalia (Huber et al.