endoderm
noun
en·do·derm
ˈen-də-ˌdərm 
1
a
: the innermost of the three primary germ layers of an embryo that is the source of the epithelium of the digestive tract and its derivatives and of the lower respiratory tract
b
: a tissue (such as esophageal or pancreatic tissue) derived from this germ layer
2
: the inner layer of cells of a diploblastic animal (such as a jellyfish or sponge)
Examples of endoderm in a Sentence
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Its hollow shell is made of cells that will form the placenta (called trophoblast stem cells, or TSCs) and the yolk sac (the extra-embryonic endoderm, or XEN cells).
—
Philip Ball, Quanta Magazine, 13 June 2023
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Philip Ball, Quanta Magazine, 13 June 2023
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Cite this Entry
“Endoderm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endoderm. Accessed 28 Nov. 2024.
Copy CitationKids Definition
endoderm
noun
en·do·derm
ˈen-də-ˌdərm
1
: the innermost of the three basic layers of an embryo that forms the epithelium of the digestive tract and the parts of the body formed from it
2
: the inner layer of cells of an animal (as a jellyfish or hydra) whose body is composed of two layers of cells
Medical Definition
endoderm
noun
en·do·derm
ˈen-də-ˌdərm
: the innermost of the three primary germ layers of an embryo that is the source of the epithelium of the digestive tract and its derivatives and of the lower respiratory tract
also
: a tissue that is derived from this germ layer
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