Added 10 October 2026 trisomic adjective Categories: Rare Words adjective ! Definition from Wiktionary (CC BY-SA). More about trisomic at Wordnik → Where our words come from → Having three copies of a given chromosome in each somatic cell instead of the usual number of two noun An organism that exhibits trisomy Related Words: conceptustetrasomictriploidtetrasomaltetraploidtridecaploidtetradiploiddisomicpentasomictriploidictetrapolyploidpolysomic Back to today's word