1. D2T - Noun
2. D2T - Adjective
D2T (not comparable)
(medicine) Initialism of difficult-to-treat.
D2T (uncountable)
(computing) Initialism of disk-to-tape: a method of data backup where information is copied from a disk (usually the hard disk of a computer) to a magnetic tape.
Coordinate terms: D2C, D2D, D2D2T