Embryonic sac
Embryonic Em`bry*on"ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster]

{Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; -- sometimes called also {amnios sac}, and {embryonal sac}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • embryonic sac — blastocyst …   Medical dictionary

  • Embryonic — Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios sac}, and… …   The Collaborative International Dictionary of English

  • Embryonic vesicle — Embryonic Em bry*on ic, a. (Biol.) Of or pertaining to an embryo; embryonal; rudimentary. [1913 Webster] {Embryonic sac} or {Embryonic vesicle} (Bot.), the vesicle within which the embryo is developed in the ovule; sometimes called also {amnios… …   The Collaborative International Dictionary of English

  • Embryonic hemoglobin — is a protein transcribed by the HBE1 gene in embryonic cells. It is produced in the blood islands in the embryonic yolk sac during the mesoblastic stage (1st week of pregnancy till end of pregnancy). The protein is commonly referred to as… …   Wikipedia

  • embryonic membrane — n. any of several living membranes enclosing or closely associated with the developing vertebrate embryo, as the allantois, amnion, yolk sac, etc. * * * …   Universalium

  • embryonic membrane — n. any of several living membranes enclosing or closely associated with the developing vertebrate embryo, as the allantois, amnion, yolk sac, etc …   English World dictionary

  • embryonic disc — embryonic disc, the part of the inner cell mass of the blastula from which the embryo develops. It is located between two cavities, the amniotic cavity and the yolk sac. It consists of three germ layers, the ectoderm, the mesoderm, and the… …   Useful english dictionary

  • sac — 1. A pouch or bursa. SYN: saccus [TA]. SEE ALSO: sacculus. 2. An encysted abscess at the root of a tooth. 3. The capsule of a tumor, or envelope of a cyst. [L. saccus, a …   Medical dictionary

  • embryonic disc — the early embryo before the formation of somite. It is a flat disc of tissue bounded dorsally by the amniotic cavity and ventrally by the yolk sac. The formation of the primitive streak and archenteron in the embryonic disc determines the… …   Medical dictionary

  • embryonic disc — the early embryo before the formation of somites. It is a flat disc of tissue bounded dorsally by the amniotic cavity and ventrally by the yolk sac. The formation of the primitive streak and archenteron in the embryonic disc determines the… …   The new mediacal dictionary

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