epibolic invagination
Invagination In*vag`i*na"tion, n. [L. pref. in- + vagina sheath.] [1913 Webster] 1. (Biol.) The condition of an invaginated organ or part. [1913 Webster]

2. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed. [PJC]

3. Specifically: (Biol., Embryology) The inward movement of one part of the wall of a blastula, to form a gastrula; the process of gastrulation, in which layers of the ovum are differentiated. [1913 Webster +PJC]

Note: In {embolic invagination}, one half of the blastosphere is pushed in towards the other half, producing an embryonic form known as a gastrula. -- In {epibolic invagination}, a phenomenon in the development of some invertebrate ova, the epiblast appears to grow over or around the hypoblast. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Invagination — In*vag i*na tion, n. [L. pref. in + vagina sheath.] [1913 Webster] 1. (Biol.) The condition of an invaginated organ or part. [1913 Webster] 2. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed.… …   The Collaborative International Dictionary of English

  • epibolic — |epə|bälik adjective : of, relating to, produced by, or involving epiboly epibolic invagination epibolic growth …   Useful english dictionary

  • Epibolic — Ep i*bol ic, a. [Gr. ? to throw upon, add to; epi upon + ? to throw.] (Biol.) Growing or covering over; said of a kind of invagination. See under {Invagination}. [1913 Webster] …   The Collaborative International Dictionary of English

  • embolic invagination — Invagination In*vag i*na tion, n. [L. pref. in + vagina sheath.] [1913 Webster] 1. (Biol.) The condition of an invaginated organ or part. [1913 Webster] 2. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity… …   The Collaborative International Dictionary of English

  • Epiboly — E*pib o*ly, n. [Cf. Gr. ? a throwing upon.] (Biol.) Epibolic invagination. See under {Invagination}. [1913 Webster] …   The Collaborative International Dictionary of English

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