CIDR (disambiguation)

CIDR is Classless Inter-Domain Routing, a method for allocating IP addresses and routing Internet Protocol packets.

CIDR may also refer to:

Biology and medicine

 * Controlled internal drug release, devices used in livestock for the synchronization of estrus
 * Center for Infectious Disease Research at the University of Wisconsin
 * Center for Global Infectious Disease Research, now a part of the Seattle Children's Research Institute
 * Not to be confused with the Center for Infectious Disease Research and Policy at UMinn

Miscellaneous other uses

 * Conference on Innovative Data Systems Research
 * CIDR-FM, an FM radio station in Windsor, Ontario, Canada