There is no such currency as the 'circa'. 'circa' means 'approximately'.
'circa' may not be a currency at all; if your referent says 'circa', it may mean 'about'
No, circa does not need to be capitalized.
Circa is a preposition.
"Circa" means 'around.'
Circa is abbreviated as ca.
Circa means "approximately"
Circa Enterprises was created in 1985.
Circa Enterprises's population is 2,008.
The population of Circa Enterprises is 197.
Circa - album - was created in 1997.
Circa - company - was created in 1999.