endosteum

noun
end·​os·​te·​um | \en-ˈdä-stē-əm \
plural endostea\ en-​ˈdä-​stē-​ə \

Definition of endosteum 

: the layer of vascular connective tissue lining the medullary cavities of bone

First Known Use of endosteum

circa 1881, in the meaning defined above

History and Etymology for endosteum

New Latin, from end- + Greek osteon bone — more at osseous

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The first known use of endosteum was circa 1881

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endosteum

noun
end·​os·​te·​um | \en-ˈdäs-tē-əm \
plural -tea\ -​tē-​ə \

Medical Definition of endosteum 

: the layer of vascular connective tissue lining the medullary cavities of bone

More from Merriam-Webster on endosteum

Britannica.com: Encyclopedia article about endosteum

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