endosteum

As a letter s

is the letter s with a.

As a noun endosteum is

(biology) a membranous vascular layer of cells which line the medullary cavity of a bone.

is likely misspelled.

has no English definition.

As a noun endosteum

is a membranous vascular layer of cells which line the medullary cavity of a bone.

As nouns the difference between endosteum and periosteum

is that endosteum is (biology) a membranous vascular layer of cells which line the medullary cavity of a bone while periosteum is a membrane surrounding a bone.

As a noun endosteum

is a membranous vascular layer of cells which line the medullary cavity of a bone.

As an adjective periendosteal is

surrounding the endosteum.

As a noun endosteum

is (biology) a membranous vascular layer of cells which line the medullary cavity of a bone.

As an adjective endosteal is

of or pertaining to the endosteum.