DICT.TW Dictionary Taiwan

 the·ta /ˈθetə, ||ˈθitə/
 希蠟字母的第八字

 The·ta n.  A letter of the Greek alphabet corresponding to th in English; -- sometimes called the unlucky letter, from being used by the judges on their ballots in passing condemnation on a prisoner, it being the first letter of the Greek qa`natos, death.
 Theta function Math., one of a group of functions used in developing the properties of elliptic functions.
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 theta
      n : the 8th letter of the Greek alphabet