noun Etymology: Middle English, from Latin, from Greek thēta, of Semitic origin; akin to Hebrew ṭēth teth Date: 15th century the 8th letter of the Greek alphabet, ~ rhythm
THETA
Meaning of THETA in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012