definiens: means, with respect to each Party, proprietary data or information thatbelong in whole or in part to such Party, its Affiliates or sublicensees, including, without limitation, ( a ) all MedImmuneIntellectual Property, [COMPANY] Excluded IP, and Aevi Intellectual Property, ( b ) any information designated asConfidential Information of such Party hereunder, in all cases that, if disclosed in writing, is marked with the words or words of similar import, and if disclosed orally or visually, is described in reasonabledetail in a written notice sent by the Disclosing Party to the Receiving Party within thirty ( 30 ) days of the oral or visualdisclosure requesting that such information be treated as Confidential Information hereunder and ( c ) all informationthat a reasonable person would understand to be confidential or proprietary in nature, whether or not marked as such