1. Of or pertaining to the epigenesis; produced according to the theory of epigenesis 
2. (biology) arising from non-genetic external factors

Encyclopedia: Epigenetic

• irretrievable
• irretrievably
• irreverence
• irreverent
• irreverently
• irreversibility
• irreversible
• irreversible process
• irreversibly
• irrevocability
• irrevocable
• irrevocableness
• irrevocably
• irrevokable
• irridenta
• irridentism
• irridentist
• irrigate
• irrigation
• irrigation ditch
• irritability
• irritable
• irritable bowel syndrome
• unproblematic
• unprocessed