(also Teth, Tet) is the ninth letter of many Semitic abjads, including Phoenician, Aramaic, Hebrew , Syriac and Arabic (in abjadi order, 16th in modern order).
Its value is IPA , one of the Semitic emphatic consonants.
The Phoenician letter gave rise to the Greek Theta (Θ).
As well, in gematria, the number 15 is written with Teth and Vav, (9+6) to avoid the normal construction Yodh and He (10+5) which spells a name of God. Similarly, 16 is written with Teth and Zayin (9+7) instead of Yodh and Vav (10+6) to avoid spelling part of the Tetragrammaton.
Teth is also one of the seven letters which receive a special crown (called a tagin) when written in a Sefer Torah. See Shin, Ayin, Gimmel, Nun, Zayin, and Tzadi.
Phoenician alphabet | Arabic letters
ט | Tet (lizherenn) | Thet | Tet (Buchstabe) | Thet | Tet (lettre) | ט | Tet (letter) | Tet (kirjain)