The pungent aromatic rhizome or tuber of certain East Indian or Chinese species of Alpinia (Alpinia Galanga and Alpinia officinarum) and of the Kæmpferia Galanga), -- all of the Ginger family.
Used in Thai cooking, galanga is a rhizome similar to ginger in many ways. Tom ka gai (chicken in coconut milk soup) uses galanga, chicken, green chilies, lemon grass and lime juice as well as coconut milk.
A root spice related to ginger, which has a musky flavor reminiscent of saffron. It is found dried whole or in slices, and also in powder.