ovisac
(Order Notostraca):
In female, brood chamber for eggs on each appendage of last (11th) thoracic segments; chamber formed by exopod, with epipod serving as lid [Stachowitsch, 1992].
(Order Anostraca):
In female, unpaired, sac-like structure projecting from ventral surface of first and second abdominal somites (= genital somite). Contains cement glands and serves as brood chamber for eggs. (cylindrical, subglobular). (Syn. egg sac) [Stachowitsch, 1992].
(Class Cephalocarida):
Sac-like structure attached to rudimentary appendage ("genital appendage") of ninth postcephalic segment (= first abdominal segment). Serves as brood chamber for egg. (single, paired) [Stachowitsch, 1992].
(Order Tanaidacea):
In female of certain tanaidaceans, term applied to brood chamber formed by single pair of oostegites of fifth pereopod pair. See: marsupium [Stachowitsch, 1992].
(Subclass Cirripedia):
Region of mantle cavity in which eggs are brooded. (See also brood chamber) [Stachowitsch, 1992].
(Class Ostracoda):
In female, sac-like structure projecting from ventral surface of first abdominal segment (genital somite). Secreted by oviduct; serves as brood chamber for extruded, fertilized eggs. (single, paired). (Syn. egg sac) [Stachowitsch, 1992].
(Order Euphausiacea):
In certain female euphausiaceans, sac-like structure associated with posterior thoracopods and serving to brood eggs. (single, double, fused) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

Look at other dictionaries:

  • Ovisac — O vi*sac, n. [Ovum + sac.] (Anat.) (a) A Graafian follicle; any sac containing an ovum or ova. (b) The inner layer of the fibrous wall of a Graafian follicle. [1913 Webster] …   The Collaborative International Dictionary of English

  • ovisac — [ō′vi sak΄] n. [ OVI + SAC] 1. OOTHECA 2. an egg receptacle …   English World dictionary

  • ovisac — n. [L. ovum, egg; saccus, bag] 1. An egg capsule, brood pouch, or receptacle. 2. (ARTHROPODA: Crustacea) In female Copepoda, the external sac attached to the somite that bears the openings of the gonoducts. 3. (ARTHROPODA: Insecta) In coccids,… …   Dictionary of invertebrate zoology

  • ovisac — ovisaclike, adj. /oh veuh sak /, n. Zool. a sac or capsule containing an ovum or ova. [1825 35; OVI + SAC] * * * …   Universalium

  • ovisac — ovi·sac ō və .sak n GRAAFIAN FOLLICLE * * * ovi·sac (oґvĭ sak) [ovi + sac] an egg containing capsule, such as a vesicular ovarian follicle …   Medical dictionary

  • ovisac — (o vi sak) s. m. Terme d anatomie. Nom donné aux vésicules ovariennes dans toutes les périodes de leur existence. ÉTYMOLOGIE    Lat. ovum, oeuf, et sac …   Dictionnaire de la Langue Française d'Émile Littré

  • ovisac — o|vi|sac Mot Agut Nom masculí …   Diccionari Català-Català

  • ovisac — əʊvɪsæk n. sac which contains an egg (Zoology) …   English contemporary dictionary

  • ovisac — ovi·sac …   English syllables

  • ovisac — o•vi•sac [[t]ˈoʊ vəˌsæk[/t]] n. zool. a sac or capsule containing an ovum or ova …   From formal English to slang

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