Definition of "indoles"

He must be treated as the Brachmans did their children, whose indoles they disliked.

1673, Obadiah Walker, Of education, especially of young gentlemen, page 93

Such is the indoles of the Humane Nature, where it is not strangely over-grown with Barbarousness.

1677, Sir Matthew Hale, The primitive origination of mankind, page 160

Every language has its own ‘indoles’.

1882 July, The Quarterly Review, page 214