Added 9 October 2026 nicu noun Categories: SocietyRare Words noun ! Definition from WordNet 3.1, Princeton University. More about nicu at Wordnik → Where our words come from → An intensive care unit designed with special equipment to care for premature or seriously ill newborn. Related Words: picupreemiepreemiesisoletteemcspremieecmoshilohospisolettesapgarneonatology Back to today's word