Definition of Sub-

Sub-: Prefix meaning meaning under, below, less than normal, secondary, less than fully. As in subacute, subaortic stenosis, subarachnoid, subclavian, subclinical disease, subcutaneous, subdural, subglottis, subjacent, sublingual, subluxation, and subtotal hysterectomy. From the Latin preposition sub meaning under.

See also: Hypo-.


Last Editorial Review: 10/9/2012

Search MedTerms:


Back to MedTerms online medical dictionary A-Z List
Pill Identifier Tool

Need help identifying pills and medications?
Use the pill finder tool on RxList.