What is "dougla"

Dougla (or dugla) is a word used by people of the West Indies, especially in Guyana, Suriname, and Trinidad and Tobago. It is used to describe Caribbean people who are a product of African and Indian descent. It is a non-hereditary means of naming people; that is, dougla progeny would usually be categorized as another race based on the progeny's appearance, even in the case of dougla-dougla unions.