A group of eight bits that is treated either as a single entity or as an array of 8 individual bits.
Source(s):
FIPS 197

  A string of eight bits.
Source(s):
NIST SP 800-106

  A sequence of 8 bits.
Source(s):
NIST SP 800-38D

  A group of eight bits that is treated either as a single entity or as an array of eight individual bits.
Source(s):
NIST SP 800-67 Rev. 2
NIST SP 800-67 Rev. 1 [Superseded]

  A bit string consisting of eight bits.
Source(s):
NIST SP 800-56B Rev. 2

  A bit string consisting of eight bits. A byte is represented by a hexadecimal string of length two. The right-most hexadecimal character represents the rightmost four bits of the byte, and the left-most hexadecimal character of the byte represents the left-most four bits of the byte. For example, 9d represents the bit string 10011101.
Source(s):
NIST SP 800-56A Rev. 2 [Superseded]

  A bit string of length eight. A byte is represented by a hexadecimal string of length two. The rightmost hexadecimal character represents the rightmost four bits of the byte, and the leftmost hexadecimal character of the byte represents the leftmost four bits of the byte. For example, 9d represents the bit string 10011101.
Source(s):
NIST SP 800-56B Rev. 1 [Superseded]