Dictionary
cir•ca
Pronunciation: (sûr'ku), [key]—
prep., adv.
about: (used esp. in) approximate dates:
The Venerable Bede was born circa 673. Abbr.: ca, ca., c., c, cir., circ.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.