Definition of quadroon in US English:

quadroon

noun

offensive, dated
  • A person who is one-quarter black by descent.

Origin

Early 18th century (earlier as quarteron): via French from Spanish cuarterón, from cuarto ‘quarter’, from Latin quartus; later assimilated to words beginning with quadri-.

Pronunciation

quadroon

/kwɑˈdrun//kwäˈdro͞on/