DuckCorp Dico

Found one definition

1.                 From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
                   
   
   
                   
                     
   ter in die /tˈɜːɹ ɪn dˈaɪ/ (t.i.d. /tˈiː ˈaɪ dˈiː/)
   dreimal täglich, 3 x täglich [pharm.]
         "quater in die"  - viermal täglich, 4 x täglich
      Synonym: three times a day
    see: every day, daily, on a daily basis, every day, in dies, quaque die, twice a day, bis in die, four times a day