English Dictionary: Theta | by the DICT Development Group |
2 results for Theta | |
From WordNet (r) 3.0 (2006) [wn]: | |
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From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
Theta \The"ta\, n. [L., fr. Gr. qh^ta, the Greek letter [theta], [THETA].] 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. |