Emily Dickinson Lexicon

SE-CRE'TION, n.

1. The act of secerning; the act of producing from the blood substances different from the blood itself, or from any of its constituents, as bile, saliva, mucus, urine, &c. This was considered by the older physiologists as merely a separation from the blood of certain substances previously contained in it; the literal meaning of secretion. But this opinion is now generally exploded. The organs of secretion are of very various form and structure, but the most general are those called glands. – Ed. Encyc.
2. The matter secreted, as mucus, perspirable matter, &c.