TRD

TRD may refer to:

(automobile) Toyota Racing Development, the in-house tuning shop for Toyota-brand automobiles.
(psychology) Treatment-resistant depression (or Treatment Refractory Depression), a type of depression used to describe individuals diagnosed with major depressive disorder and do not respond to traditional forms of treatment (namely, medication and psychotherapy).
Trondheim Airport, Værnes (IATA Airport Code TRD).

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