| Jansen's operation | An operation for frontal sinus disease, the lower wall and lower portion of the anterior wall being removed and the mucous membrane curetted away. (05 Mar 2000) |
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| Jansen, Albert | <person> German otologist, 1859-1933. See: Jansen's operation. (05 Mar 2000) |
| jansenist | A follower of Cornelius Jansen, a Roman Catholic bishop of Ypres, in Flanders, in the 17th century, who taught certain doctrines denying free will and the possibility of resisting divine grace. Origin: F. Janseniste. Source: Websters Dictionary (01 Mar 1998) |