Exudation \Ex`u*da"tion\, n. The act of exuding; sweating; a discharge of humors, moisture, juice, or gum, as through pores or incisions; also, the substance exuded.

Resins, a class of proximate principles, existing in almost all plants and appearing on the external surface of many of them in the form of exudations. --Am. Cyc.

Source: Webster's Revised Unabridged Dictionary (1913)