nicu nictitation • nid · · · Info · Definitions · Synonyms · Characters · · nicu · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) an intensive care unit designed with special equipment to care for premature or seriously ill newborn. Synonyms: neonatal intensive care unit, NICU. · · Noun Definition 1 Synonyms · · · neonatal intensive care unit · · Synonym 1 Characters · · c latin small letter c U+0063 i latin small letter i U+0069 n latin small letter n U+006E u latin small letter u U+0075