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Definition of Germ layer
1. Noun. (embryology) any of the 3 layers of cells differentiated in embryos following gastrulation.
Specialized synonyms: Ectoblast, Ectoderm, Exoderm, Mesoblast, Mesoderm, Endoblast, Endoderm, Entoblast, Entoderm, Hypoblast
Category relationships: Embryology
Definition of Germ layer
1. Noun. (context: embryology) A collection of cells assembled during embryogenesis that eventually develop into all tissues and organs via organogenesis in animals. ¹
¹ Source: wiktionary.com
Medical Definition of Germ layer
1.
Germ Layer Pictures
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Lexicographical Neighbors of Germ Layer
Literary usage of Germ layer
Below you will find example usage of this term as found in modern and/or classical literature:
1. Text-book of the embryology of man and mammals by Oscar Hertwig, Edward Laurens Mark (1905)
"THE outer germ-layer has for a long time also borne the name dermo-sensory layer.
... In this region the cells of the outer germ-layer grow out into long ..."
2. A Manual of Histology by Salomon Stricker (1872)
"The germ-membrane, according to him, consists of a layer of granules, constituting
the foundation from which later the under germ- layer will be formed. ..."
3. Clinical Rheumatology: A Problem-oriented Approach to Diagnosis and Management by Roland W. Moskowitz (1921)
"The red dots mark the limit of the mesoderm: ak, outer germ layer (blue); mw,
medullary ridges or folds; ff, neural tube; am, amniotic fold; t'o/, hof, so/, ..."
4. The evolution of man: a popular exposition of the principal points of human by Ernst Heinrich Philipp August Haeckel (1897)
"The important process of fission in the middle germ-layer which occasions ...
At first the extent of this middle germ-layer is co-extensive with that of the ..."
5. Text-book of the Embryology of Invertebrates by Eugen Korschelt, Karl Heider, Edward Laurens Mark, William McMichael Woodworth, Matilda Bernard, Martin Fountain Woodward (1899)
"Cleavage and Formation of the Germ-layer. The cleavage of the egg in Scorpions
is discoidal. At the pole of the egg, which is directed from the follicle ..."
6. The Unity of the Organism; Or, The Organismal Conception of Life by William Emerson Ritter (1919)
"7 * The Exact Mode of Involvement of the Germ-plasm Theory in the Germ-Layer
Theory We return now to the immediate point, namely that of the way the ..."
7. The Unity of the Organism; Or, The Organismal Conception of Life by William Emerson Ritter (1919)
"7 * The Exact Mode of Involvement of the Germ-plasm Theory in the Germ-Layer
Theory We return now to the immediate point, namely that of the way the ..."