%exudation%

n. The act of exuding; sweating; a discharge of humors, moisture, juice, or gum, as through pores or incisions; also, the substance exuded. [ 1913 Webster ]

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. [ 1913 Webster ]