albuminin

from The Century Dictionary.

• noun The substance of the cells inclosing the white of birds' eggs. It contains no nitrogen, and dissolves in caustic potash. Also called oönin.

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

• noun (Chem.) The substance of the cells which inclose the white of birds' eggs.

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

• noun biochemistry The substance of the cells that enclose the white of birds' eggs.