1. Pertaining to, or caused by, aphthae; characterized by aphthae
   "aphthous ulcers"

Encyclopedia: Aphthous

• Ononis
• Ononis repens
• Ononis spinosa
• Onopordon
• Onopordon acanthium
• Onopordum
• Onopordum acanthium
• Onosmodium
• onrush
• Onsager
• onset
• onshore
• onside
• onslaught
• onstage
• Ontarian
• Ontario
• ontic
• onto
• ontogenesis
• ontogenetic
• ontogeny
• ontological
• ontologically
• ontologist