germinal disk

germinal disk
germinal disk
n.
1. a disklike spot in a fertilized ovum in which the first traces of the embryo are visible
2. the disklike spot on the yolk of a heavily yolked egg where segmentation begins after fertilization: see EGG1

English World dictionary. . 2014.

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  • germinal disk — n 1) BLASTODISC 2) the part of the blastoderm that forms the embryo proper of an amniote vertebrate …   Medical dictionary

  • germinal disk — Embryol. blastodisk. [1875 80] * * * …   Universalium

  • germinal disk — noun a small circular white spot on the surface of the yolk of an egg …   Wiktionary

  • germinal disk — Embryol. blastodisk. [1875 80] …   Useful english dictionary

  • Disk — (d[i^]sk), n. [L. discus, Gr. di skos. See {Dish}.] [Written also {disc}.] 1. A discus; a quoit. [1913 Webster] Some whirl the disk, and some the javelin dart. Pope. [1913 Webster] 2. A flat, circular plate; as, a disk of metal or paper. [1913… …   The Collaborative International Dictionary of English

  • Disk engine — Disk Disk (d[i^]sk), n. [L. discus, Gr. di skos. See {Dish}.] [Written also {disc}.] 1. A discus; a quoit. [1913 Webster] Some whirl the disk, and some the javelin dart. Pope. [1913 Webster] 2. A flat, circular plate; as, a disk of metal or paper …   The Collaborative International Dictionary of English

  • Disk shell — Disk Disk (d[i^]sk), n. [L. discus, Gr. di skos. See {Dish}.] [Written also {disc}.] 1. A discus; a quoit. [1913 Webster] Some whirl the disk, and some the javelin dart. Pope. [1913 Webster] 2. A flat, circular plate; as, a disk of metal or paper …   The Collaborative International Dictionary of English

  • disk — 1. A round, flat plate; any approximately flat circular structure. 2. SYN: lamella (2). 3. In dentistry, a circular piece of thin paper or other material, coated with an abrasive substance, used for cutting and polishing tee …   Medical dictionary

  • germinal disc — /dʒɜmənəl ˈdɪsk/ (say jermuhnuhl disk) noun → blastodisc …  

  • blas|to|disk — or blas|to|disc «BLAS tuh dihsk», noun. a disklike aggregation of formative protoplasm at one pole of the yolk of a fertilized egg, containing the nucleus; germinal disk …   Useful english dictionary

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