acr. 1 http://en.wikipedia.org/wiki/Classless%20Inter-Domain%20Routing; normally an IP address notation such as 192.168.
0/24 indicating a block of addresses. The number after the slash indicates how many bits are in the mask; bits to the ''right'' are not masked. 2 Controlled Internal Drug Release; technology for the controlled release of a hormone or drug, for example as used to release progesterone in beef cattle.
CIDR is Classless Inter-Domain Routing, a method for allocating IP addresses and routing Internet Protocol packets.
CIDR may also refer to:
- Controlled internal drug release, devices used in livestock for the synchronization of estrus
- Conference on Innovative Data Systems Research
- CIDR-FM, an FM radio station in Windsor, Ontario, Canada