Definition from Wiktionary, the free dictionary
See also E
From ㄷ (d) + additional horizontal line representing burst of aspiration.
- 티읕 (tieut), a jamo (letter) of the alphabet of the Korean writing system, hangeul; the aspirated alveolar plosive (IPA: [tʰ])
Usage notes 
In the North Korean order, ㅌ (t) is the twelfth jamo. In the South Korean order, it is the seventeenth.