Adjacent Words

Tau definitions

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Webster's 1828 Dictionary

TAU, n. The toad fish of Carolina, a species of Gadus.(G.tau.)
1. A species of beetle; also, a species of moth, (Phalena;) also, a kind of fly, (Musca.)

WordNet (r) 3.0 (2005)

n
1: the 19th letter of the Greek alphabet

Merriam Webster's

noun Etymology: Middle English taw, from Latin tau, from Greek, of Semitic origin; akin to Hebrew t?w taw Date: 14th century 1. the 19th letter of the Greek alphabet — see alphabet table 2. a short-lived elementary particle of the lepton family that exists in positive and negative charge states and has a mass about 3500 times greater than an electron — called also tau particle 3. a protein that binds to and regulates the assembly and stability of neuronal microtubules and that is found in an abnormal form as the major component of neurofibrillary tangles

Oxford Reference Dictionary

n. the nineteenth letter of the Greek alphabet (T). Phrases and idioms: tau cross a T-shaped cross. tau particle Physics an unstable, heavy, and charged elementary particle of the lepton class. Etymology: ME f. Gk

Webster's 1913 Dictionary

Tau Tau (tou), n. [Gr. tay^.] The nineteenth letter ([Tau], [tau]) of the Greek alphabet, equivalent to English t.

Webster's 1913 Dictionary

Tau Tau, n. [Gr. tay^ the letter [tau] (English T).] (Zo["o]l.) The common American toadfish; -- so called from a marking resembling the Greek letter tau ([tau]). Tau cross. See Illust. 6, of Cross.