Wordnet 3.0
ADJECTIVE (1)
1.
of or relating to aptitudes;
The Collaborative International Dictionary of English v.0.48:
Aptitudinal \Apt`i*tu"di*nal\, a.
Suitable; fit. [Obs.]
[1913 Webster]
WordNet (r) 3.0 (2006):
aptitudinal
adj 1: of or relating to aptitudes