AgNOR
(redirected from Argyrophilic Nucleolar Organizer Region)Also found in: Acronyms.
AgNOR
Argyrophilic Nucleolar Organizer Region. A loop of nucleolar DNA which encodes rRNA. AgNORs reflect proliferation; the number of AgNORs may correlate with tumour behaviour. In Kaposi sarcoma, AgNOR staining in tissue increases as the tumours become more aggressive.Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.