one of the three primary embryonic cell layers.
(embryol) any of the three layers of cells formed during gastrulation See ectoderm, mesoderm, endoderm
germ layer n.
Any of the three primary cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate and from which the organs and tissues of the body develop.
Any of three cellular layers, the ectoderm, endoderm, or mesoderm, into which most animal embryos differentiate in the gastrula stage and from which the organs and tissues of the body develop through further differentiation.
[jurm] /dʒɜrm/ noun 1. a microorganism, especially when disease-producing; microbe. 2. a bud, offshoot, or seed. 3. the rudiment of a living organism; an embryo in its early stages. 4. the initial stage in development or evolution, as a or ancestral form. 5. something that serves as a source or initial stage for subsequent development: […]
[jurm-lahyn] /ˈdʒɜrmˌlaɪn/ noun, Biotechnology. 1. the insertion of cloned genes into the egg or sperm cell of an organism, using a gene transfer technique, in order to perpetuate a desired trait in its descendants, as pest-resistance in a crop plant.
- Germ membrane
germ membrane n. See blastoderm.
noun 1. the protoplasm of the germ cells containing the chromosomes. noun 1. germ plasm n.