tau

Noun

WORDNET DICTIONARY

tau(n = noun.communication) Array - the 19th letter of the Greek alphabet; Array

is a kind of alphabetic character, letter, letter of the alphabet

tau, n. [Gr. tay^.].

The nineteenth letter (t. [Webster 1913 Suppl.]

tau, n. [Gr. tay^ the letter T).].

The common American toadfish; -- so called from a marking resembling the Greek letter tau (1913 Webster]

Tau cross. See Illust. 6, of Cross.

tau, n. the nineteenth letter of the Greek alphabet (T).

Idiom

tau cross a T-shaped cross. tau particle Physics an unstable, heavy, and charged elementary particle of the lepton class.

Etymology

ME f. Gk