serolin

from The Century Dictionary.

• noun Same as stercorin.
• noun A term formerly applied to a mixture of fats contained in dried blood-serum.

from the GNU version of the Collaborative International Dictionary of English.

• noun A peculiar fatty substance found in the blood, probably a mixture of fats, cholesterin, etc.
• noun A body found in fecal matter and thought to be formed in the intestines from the cholesterin of the bile; -- called also stercorin, and stercolin.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biochemistry A fatty substance found in the blood, probably a mixture of fats, cholesterin, etc.
• noun biochemistry A body found in faeces and thought to be formed in the intestines from the cholesterin of the bile.