The Collaborative International Dictionary of English v.0.48:
nu \nu\ n. The 13th letter of the Greek alphabet ([nu]). [WordNet 1.5]WordNet (r) 3.0 (2006):
nu n 1: the 13th letter of the Greek alphabetThe Free On-line Dictionary of Computing (30 December 2018):
nuThe country code for Niue. (1999-01-27) Because it sounds like "new", nu is heavily used for vanity domains. (1999-01-27)