noun the watery portion of certain animal fluids, as blood, milk, ·etc.
2. serum ·noun a thin watery fluid, containing more or less albumin, secreted by the serous membranes of the body, such as the pericardium and peritoneum.
noun the watery portion of certain animal fluids, as blood, milk, ·etc.
2. serum ·noun a thin watery fluid, containing more or less albumin, secreted by the serous membranes of the body, such as the pericardium and peritoneum.
Webster English vocab. Английский словарь Webster. 2012