The Collaborative International Dictionary of English v.0.48:
Fomor \Fomor\ n. 1. (Irish) one of a group of sea demons sometimes associated with the hostile power of nature. Syn: Fomorian. [WordNet 1.5]WordNet (r) 3.0 (2006):
Fomor n 1: one of a group of Celtic sea demons sometimes associated with the hostile power of nature [syn: Fomor, Fomorian]