Wordnet 3.0
NOUN (1)
1.
an offspring of a mulatto and a white parent;
a person who is one-quarter black;
The Collaborative International Dictionary of English v.0.48:
Quadroon \Quad*roon"\, n. [F. quarteron, or Sp. cuarteron. See
Quarter a fourth part, and cf. Quarteron.]
The offspring of a mulatto and a white person; a person
quarter-blooded. [Written also quarteron, quarteroon, and
quateron.]
[1913 Webster]
WordNet (r) 3.0 (2006):
quadroon
n 1: an offspring of a mulatto and a white parent; a person who
is one-quarter black