also etcetera, early 15c., from Latin et cetera, literally "and the others," from et "and" + neuter plural of ceterus "the other, other part, that which remains," from Proto-Italic *ke-etero‑, from *ke-, variant form of PIE root *ko-, the stem of demonstrative pronoun meaning "this" + *etero‑ "other (of two), again, a second time, again," a PIE adjective of comparison.
The common form of the abbreviation before 20c. was &c., but etc. now prevails.
updated on December 16, 2017