C.

Noun

 * 1) Century.
 * Fig. 2: a 13 th C. illumination of ‘H’

Usage notes
This is the customary abbreviation of this term as used in legal citation. See, e.g., The Bluebook: A Uniform System of Citation, Nineteenth Edition (2010), "Judges and Officials", Table T11, p. 443.

Etymology
.

Noun

 * 1)  b-d, bd, BD bass drum

Etymology
From archaic Latin, when the letter C represented the phonetic value /g/.