noun the·ta \ˈthā-tə, chiefly British ˈthē-tə\

Definition of theta

  1. 1 :  the 8th letter of the Greek alphabet — see alphabet table

  2. 2 :  theta rhythm

Origin and Etymology of theta

Middle English, from Latin, from Greek thēta, of Semitic origin; akin to Hebrew ṭēth teth

First Known Use: 15th century

Learn More about theta

Seen and Heard

What made you want to look up theta? Please tell us where you read or heard it (including the quote, if possible).