Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

theta

play
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

Rhymes with 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).