The number of bits in an input (or output) block of the block cipher.
Sources:
NIST SP 800-38A
under Block Size
For a given block cipher, the fixed length of the input (or output) bit strings.
Sources:
NIST SP 800-38B
under Block Size
The bit length of an input (or output) block of the block cipher.
Sources:
NIST SP 800-38C
under Block Size
For a given block cipher and key, the fixed length of the input (or output) bit strings.
Sources:
NIST SP 800-38D
under Block Size
NIST SP 800-38F