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What does mega- mean in medical terms?
mega-
Meaning: large, great
Type: Prefix
A prefix goes at the very start of a word, before the root. On this page: what mega- means, and real medical words that use it, each broken down into its parts.
Example words using mega-
megacolon
mega- (large) + colon (large intestine) = an abnormally enlarged colon
mega- (large) + colon (large intestine) = an abnormally enlarged colon
megakaryocyte
mega- (large) + karyo (nucleus) + cyte (cell) = a large bone-marrow cell with a large nucleus
mega- (large) + karyo (nucleus) + cyte (cell) = a large bone-marrow cell with a large nucleus
Shortened forms
Charts and notes shorten long terms — see the Medical Abbreviations guide for the short forms you will meet in real records.
Please note: This section teaches the language of medicine — what word parts mean and how terms are built. It is an educational reference, not medical advice. For the meaning of a word in your own medical record, ask the clinician who wrote it.