Galangal n. : The pungent aromatic rhizome or tuber of certain East Indian or Chinese species of Alpinia (A. Galanga and A. officinarum) and of the Kaempferia Galanga), -- all of the Ginger family.

Example:
Can anyone tell me where I can buy fresh Galangal from?

Taxonomy
Galangal, Kha, ginger, free encyclopedia, lesser galangal, plants, herbs and spices, Alpinia galanga, Mandarin, Kaempferia galanga, Galangal root, galanga, lengkuas, kencur, aromatic, Alpinia officinarum, greater galangal, Blue Ginger.

Defination from the web:
Galangal root ready to be prepared for cooking ... In its raw form, galangal has a citrusy, earthy aroma, with hints of pine and soap in ... The word galangal, or its variant galanga is used as a common name for all members of the genus Alpinia, and in common usage can refer to four ...