epicole n. [Gr. epi, upon; L. colere, to inhabit] An animal that lives on the surface of another animal and neither harms nor helps that animal.
epicondyle n. [Gr. epi, upon; kondylos, knuckle] (ARTHRO: In-secta) The cephalic or dorsal swelling of the proximal end of the mandible, articulating with a socket in the gena or postgena.
epicranial plate (ARTHRO: Insecta) In larval forms, a plate-like structure forming the epicranium epicranial stem (ARTHRO: Insecta) The coronal suture.
epicranial suture (ARTHRO: Insecta) In larval forms, the dorsal Y-shaped line of the cranium normally associated with molts, but may persist in adults and form a true sulcus; ecdysial cleavage line.
epicranium n. [Gr. epi, upon; kranion, skull] (ARTHRO: Insecta) The upper part of of the head, from the face to the neck; the calva. epicranial a.
epicuticle, epicuticula n. [Gr. epi, upon; L. dim. cutis, skin] 1. (ACANTHO) See glycocalyx. 2. (ARTHRO) The thin, outermost nonchitinous exterior layer of arthropod cuticle. 3. (ARTHRO: Chelicerata) For mites see epiostracum.
epidemic n. [Gr. epi, upon; demos, the people] 1. A rapidly spreading attack of disease in a population. 2. A disease level higher than expected for a designated area. see endemic.
epidemiology n. [Gr. epi, upon; demos, the people; logos, discourse] A science that deals with all ecological aspects of disease including transmission, distribution, prevalence, and incidence.
epiderma n [Gr. epi, upon; derma, skin] An abnormal outgrowth of the skin.
epidermis n. [Gr. epi, upon; derma, skin] 1. The cellular layer of the body wall that secretes the cuticle; the hypodermis. 2. (bryo) Secretes cuticle and calcium carbonate of the skeleton. 3. (MOLL) The periostracum. epidermal a.
epididymis n. [Gr. epi, upon; didymos, testicle] (ARTHRO: In-secta) The coiled part of the vas deferens.
epifauna n. [Gr. epi, upon; L. Faunas, deity of herds and fields] Any animal living on the surface deposits of the ocean. see infauna.
epifrontal fold (BRYO: Gymnolaemata) In Umbonulidae, a fold of the exterior body wall and body cavity arching over the frontal wall.
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