| mesal | Rarely used term referring to the median plane of the body or a part. Origin: G. Mesos, middle (05 Mar 2000) |
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| mesalamine | <chemical> An anti-inflammatory agent, structurally related to the salicylates, which is active in inflammatory bowel disease. It is considered to be the active moiety of sulphasalazine. Pharmacological action: non-steroidal anti-inflammatory agents. (12 Dec 1998) |