略語大辞典 [Med] 23 t.d.s. (L) ter di'e sumen'dum 「1日3回服用のこと」.(L) ter di'e sumen'dum; or "take or use drug t.i.d.(three times a day)"; or t.i.d.(three times a day); [Med:Chem]. 丸善「略語大辞典」JLogosID : 11851127