What is Quarterone?

Legal Definition
In the Spanish and French West Indies, a quadroon, that is, a person one of whose parents was white and the other a mulatto. See Daniel v. Guy, 19 Ark. 131.
-- Black's Law Dictionary
Legal Definition
The issue of a white person and a tercerone. See 19 Ark. 121. See, also, Tercerone.
-- Ballentine's Law Dictionary