embryonic shield
noun see embryonic disk

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • embryonic shield — the double layered disc from which the embryo proper develops; see embryonic disc, under disc …   Medical dictionary

  • embryonic shield — noun see embryonic disk 2 …   Useful english dictionary

  • embryonic shield — a thickened arm of the germ ring representing the future longitudinal axis of the embryo …   Dictionary of ichthyology

  • embryonic disk — or embryonic disc n 1 a) BLASTODISC b) BLASTODERM 2) the part of the inner cell mass of a blastocyst from which the embryo of a placental mammal develops called also embryonic shield …   Medical dictionary

  • embryonic disk — noun 1. a. : blastodisc b. : blastoderm 2. or embryonic shield : the part of the inner cell mass of a blastoc …   Useful english dictionary

  • embryonic disk — noun Date: circa 1938 1. a. blastodisc b. blastoderm 2. the part of the inner cell mass of a blastocyst from which the embryo of a placental mammal develops called also embryonic shield …   New Collegiate Dictionary

  • embryonic disk — Embryol. 1. Also called embryonic shield. in the early embryo of mammals, the flattened inner cell mass that arises at the end of the blastocyst stage and from which the embryo begins to differentiate. 2. the blastodisk of yolky eggs. [1935 40] * …   Universalium

  • shield — A protecting screen; lead sheet for protecting the operator and patient from x rays. [A.S. scild] embryonic s. a thickened area of the embryonic blastoderm from which the embryo develops. nipple s. a cap or dome placed over the …   Medical dictionary

  • Arabian-Nubian Shield — The Arabian Nubian Shield (ANS) is an exposure of Precambrian crystalline rocks on the flanks of the Red Sea. The crystalline rocks are mostly Neoproterozoic in age. Geographically and from north to south the ANS includes the nations of Israel,… …   Wikipedia

  • embryonicdisk — embryonic disk n. 1. A platelike mass of cells in the blastocyst from which a mammalian embryo develops. Also called embryonic shield. 2. See germinal disk. * * * …   Universalium

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