WordNet (r) 3.0 (2006):

iv
    adj 1: being one more than three [syn: four, 4, iv]
    n 1: the cardinal number that is the sum of three and one [syn:
         four, 4, IV, tetrad, quatern, quaternion,
         quaternary, quaternity, quartet, quadruplet,
         foursome, Little Joe]
    2: administration of nutrients through a vein [syn: intravenous
       feeding, IV]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

IV
       Initialisation Vector (cryptography)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

IV
       InformationsVerarbeitung