umbonation التعريفات والمعاني == English == === Noun === umbonation (countable and uncountable, plural umbonations) An umbo. The formation of an umbo. شارك هذه المقالة: Facebook Twitter WhatsApp LinkedIn كلمات ذات صلة umbonations umbonato umbonati umbration umbrationum umbrationem umbrationis umbratione umbrationes