What does ab- mean in medical terms?

ab-

Meaning: away from

Type: Prefix

A prefix goes at the very start of a word, before the root. On this page: what ab- means, and real medical words that use it, each broken down into its parts.

Example words using ab-

abduction
ab- (away from) + duct (to lead) + ion (action) = movement away from the midline of the body
abnormal
ab- (away from) + normal (usual) = not normal
ablation
ab- (away) + lat (to carry) + ion (action) = removal of tissue

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.