From The Collaborative International Dictionary of English v.0.48 :
Racial \Ra"cial\ (r[=a]"shal), a.
Of or pertaining to a race or family of men; as, the racial
complexion.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
racial
adj 1: of or related to genetically distinguished groups of
people; "racial groups"
2: of or characteristic of race or races or arising from
differences among groups; "racial differences"; "racial
discrimination" [ant: nonracial]