The word "oc" seems to be a misspelling or an abbreviation for a more common word. The most likely candidates could be "ocean," "october," or "oculus." However, if you're referring to "OC" in the context of creative works, it often means "original character," which refers to a character created by an individual, rather than one from existing works.
If referring to "original character," the term "original" comes from the Latin "originalis," meaning "beginning or source," and "character" derives from the Greek "charaktêr," which means "to engrave" or "a distinctive mark." In general, "ocean" comes from Latin "oceanus," meaning "great sea."
If "oc" was meant to denote a specific word not identified here, please clarify for more accurate assistance.