Quadroon

In the colonial societies of the Americas and Australia, a quadroon or quarteron (in the United Kingdom, the term quarter-caste is used) was a person with one-quarter African/Aboriginal and three-quarters European ancestry.

[1] The racial designations refer specifically to the number of full-blooded African ancestors or equivalent, emphasizing the quantitative least, with quadroon signifying that a person has one-quarter black ancestry.

The word quadroon was borrowed from the French quarteron and the Spanish cuarterón, both of which have their root in the Latin quartus, meaning "a quarter".

[3] In some cases, it was used as a general term, for instance on U.S. census classifications, to refer to all persons of mixed race, without regard for proportion of ancestries.

Octoroon was applied to a limited extent in Australia for those of one-eighth Aboriginal ancestry, as the government implemented assimilation policies on the Stolen Generations.