certificate signing request
A PKCS #10 request holding a name and public key, signed with the matching private key.
A certificate signing request (PKCS #10) carries a subject name and a public key, signed with the corresponding private key; a CA validates it and issues a certificate for that public key.
Examples
A new bench node sends a CSR containing its serial as the name and its public key, signed with its private key, to be turned into a certificate.
The CA checks the CSR's signature and that the serial is one it expects before signing a certificate for it.