略語大辞典 [Med] 33 t.i.d. (L) ter in di'e 一日三回(服用).(L) ter in di'e; or "three times a day"; or t.d.; or t.d.s.; a frequency of administration of a drug; [Med:Chem]. 丸善「略語大辞典」JLogosID : 11851129