WordNet (r) 3.0 (2006):
GU adj 1: of or related to the genital and urinary organs or their functions; "genitourinary infections" [syn: genitourinary, GU] n 1: the largest and southernmost island in the Marianas which is administered as a territory of the United States; it was ceded by Spain to the United States in 1898 [syn: Guam, GU]The Free On-line Dictionary of Computing (19 January 2023):
guThe country code for Guam. (1999-01-27)