The Collaborative International Dictionary
Indoles
Indoles \In"do*les\, n. [L. Cf. Adolescence.] Natural disposition; natural quality or abilities.
Wiktionary
indoles
Etymology 1 n. (plural of indole English) Etymology 2
n. Natural disposition; innate character; unalterable intrinsic traits and qualities (qualifier: collectively).The ''Oxford English Dictionary'' (2007)