Bible Dictionaries
Serum

Webster's Dictionary

(1):

(n.) A thin watery fluid, containing more or less albumin, secreted by the serous membranes of the body, such as the pericardium and peritoneum.

(2):

(n.) The watery portion of certain animal fluids, as blood, milk, etc.

Bibliography Information
Webster, Noah. Entry for 'Serum'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/serum.html. 1828.