The Collaborative International Dictionary of English v.0.48:
milkcap \milkcap\ n. A type of edible mushroom (Lactarius delicioso). Syn: Lactarius delicioso. [WordNet 1.5]WordNet (r) 3.0 (2006):
Lactarius delicioso n 1: edible mushroom [syn: milkcap, Lactarius delicioso]