The Collaborative International Dictionary of English v.0.48:
Poi \Po"i\, n. A national food of the Hawaiians, made by baking and pounding the kalo (or taro) root, and reducing it to a thin paste, which is allowed to ferment. [1913 Webster] PoicileWordNet (r) 3.0 (2006):
poi n 1: Hawaiian dish of taro root pounded to a paste and often allowed to ferment