rare. Also 8–9 terceron, 9 tierceroon. [a. Sp. *terceron, f. tercero a third person, f. tercio third: cf. cuarteron, quinteron.] The offspring of a white person and a mulatto, being third in descent from a negro; = QUADROON 1 a: see note there. (Distinguished from QUADROON 1 b.)

1

1760–72.  trans. Juan Ulloa’s Voy. (ed. 3), I. 29. The Tercerones, produced from a White and a Mulatio, with some approximation to the former, but not so near as to obliterate their origin.

2

1819.  W. Lawrence, Lect. Physiol., etc. 296. Europeans and Mulattos produce Tercerons (sometimes also called Quarterons, Moriscos, and Mestizos)…. Europeans and Tercerons produce Quarterons or Quadroons.

3

1878.  Bartley, trans. Topinard’s Anthropol., II. vii. 374. The mixed breeds of negroes and Europeans have various names…. The first are called mulatoes, the second, tierceroons.

4