gradatim

gradātim adv.

gradus, step by step, by degrees, little by little, gradually : (honores) adsequi: ascendere: respondens.

gradatim
grădātim, adv. [gradus], step by step , by degrees , little by little , gradually (class.; syn.:...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.