tau

Etymology
From, , from , from and

Sense 6 (“mathematical constant equal to 2π”) was used by Joseph M. Lindenberg in 1991, and popularized by the American educator and entrepreneur Michael Hartl in a 2010 paper which explains that τ resembles π; and that τ is the Greek equivalent of, the first letter of , and 2π corresponds to one turn of a circle with a radius of one unit.

Sense 8.1 (“short for tau lepton or tau particle”) was (1927–2014) after the first letter of, since the tau lepton or tauon was the third charged lepton discovered.

Noun

 * 1)  The letter  in the Greek alphabet; being the nineteenth letter of the Classical and Modern Greek, and the twenty-first letter of the Old and Ancient Greek alphabets.
 * 2) ; the 22nd and last letter of many Semitic alphabets/abjads, including Phoenician, Aramaic, Hebrew, Syriac, and Arabic.
 * 3)  A Τ-shaped object or sign; a Saint Anthony's cross, sometimes regarded as a sacred symbol.
 * 4)  A crosier with a Τ-shaped head.
 * 5) The ankh symbol (☥).
 * 6)  Chiefly written τ:
 * 7)  A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
 * 8)   Chiefly written τ: an irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its radius, equal to twice the value of pi (2π; approximately 6.2831853071).
 * 9)  Chiefly written τ.
 * 10)  or tau particle (“an unstable elementary particle which is a type of lepton, having a mass almost twice that of a proton, a negative charge, and a spin of ½; it decays into hadrons (usually pions) or other leptons, and neutrinos; a tauon”).
 * , now known as a kaon.
 * 1)  A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.
 * 2)   Chiefly written τ: an irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its radius, equal to twice the value of pi (2π; approximately 6.2831853071).
 * 3)  Chiefly written τ.
 * 4)  or tau particle (“an unstable elementary particle which is a type of lepton, having a mass almost twice that of a proton, a negative charge, and a spin of ½; it decays into hadrons (usually pions) or other leptons, and neutrinos; a tauon”).
 * , now known as a kaon.
 * 1)  Chiefly written τ.
 * 2)  or tau particle (“an unstable elementary particle which is a type of lepton, having a mass almost twice that of a proton, a negative charge, and a spin of ½; it decays into hadrons (usually pions) or other leptons, and neutrinos; a tauon”).
 * , now known as a kaon.
 * , now known as a kaon.

Verb

 * 1) to give

Noun

 * 1) Tau; the Greek letter Τ (lowercase τ)
 * 2) tav; the Hebrew letter ת|ת
 * 3)  a tau cross

Noun

 * 1)  Greek letter

Etymology
From, , from. ,.

Noun

 * 1)  tau (Greek letter)

Etymology
Borrowed from.

Noun

 * 1) tau Greek letter
 * 2) tauon, tau elementary particle

Noun

 * 1)  Greek letter
 * , tauon

Noun

 * 1)  name of the Greek letter Τ, τ

Etymology
.

Preposition

 * 1)  to

Noun

 * 1)  sun

Etymology
From.

Noun

 * 1) tau (Greek letter)

Verb

 * 1) ought, should

Etymology
Borrowed from.

Noun

 * 1) fabric
 * 2) clothing

Etymology 2
.

Noun

 * 1) tau

Noun

 * 1)  (Greek letter)

Verb

 * 1) person

Etymology 1
From, from , from.

Noun

 * 1) person; human; man
 * 2) someone; people; human being
 * 3) boyfriend; girlfriend; lover

Noun

 * 1) feast; party; banquet

Numeral

 * 1) three

Etymology 1
From, from , from , from , from.

Etymology 2
Borrowed from, from.

Noun

 * 1) the Greek letter tau (Τ or τ)

Etymology 1
From (compare 🇨🇬), from, from  (compare 🇨🇬, 🇨🇬).

Noun

 * 1) year time it takes for the Earth to complete one revolution of the Sun
 * 2) year time it takes for any planetary body to make one revolution around another body
 * 3) year a period between set dates that mark a year
 * 4) year scheduled part of a calendar year spent in a specific activity
 * 5) year Julian year
 * 6) year level or grade at school or college

Etymology 2
From, from , from (compare 🇨🇬).

Verb

 * 1) to settle

Etymology 3
From, from , from , from (compare 🇨🇬).

Noun

 * 1) knowledge

Verb

 * 1)  to know

Etymology
From, from , from , from , from.

Verb

 * 1) to know

Etymology 1
From, from , from.

Noun

 * 1) year

Etymology 2
From, from , from.

Verb

 * 1) fight

Etymology
From. Compare Mooring North Frisian,.

Numeral

 * 1)  two

Etymology 1
From.

Noun

 * 1) a rope
 * 2)   lepton
 * 3)  (Greek letter)

Etymology 1
From earlier and, from.

Noun

 * 1) a rope

Etymology 2
Borrowed from.

Noun

 * : The letter Τ/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek.
 * 1)   lepton

Etymology
From.

Adjective

 * 1)  such

Etymology
, from.

Noun

 * 1)  name of the Greek letter Τ, τ
 * 2)  tauon

Noun

 * 1) lion

Noun

 * 1) ; the Greek letter Τ, τ
 * 2) tauon

Adjective

 * 1) some

Etymology
From.

Noun

 * 1) person
 * 2) human

Verb

 * 1) to pull

Etymology
From, compare 🇨🇬 and 🇨🇬.

Verb

 * 1) to put, to place

Etymology
From.

Noun

 * 1) a dry measure, roughly equivalent to ten quarts or 1.25 pecks

Etymology 1
From.

Determiner

 * 1)  thy, your

Etymology 2
From. Cognates include 🇨🇬 and 🇨🇬.

Noun

 * 1) season
 * 2) weather
 * 3) climate

Etymology 3
From. Cognates include 🇨🇬 and 🇨🇬.

Verb

 * 1)  to pick

Usage notes

 * tau is used to refer to flowers and fruits, with the exception of the coconut and pandanus.

Etymology 4
From. Cognates include 🇨🇬 and 🇨🇬.

Verb

 * 1)  to fight; to quarrel
 * 2)  to compete

Etymology 5
From. Cognates include 🇨🇬 and 🇨🇬.

Verb

 * 1)  to hit
 * 2)  to land
 * 3)  to arrive
 * 4)  to anchor
 * 5)  to settle down

Etymology 6
From. Cognates include 🇨🇬 and 🇨🇬.

Verb

 * 1)  to count

Etymology 7
From. Cognates include 🇨🇬 and 🇨🇬.

Noun

 * 1) The point where the keel meets the stern of the canoe.

Noun

 * 1) Fresh nest fern leaves, used to cover a traditional oven.

Particle

 * 1) ; just, only, merely

Particle

 * 1) ; concerning, regarding

Particle

 * 1) ; starting to; beginning to

Etymology
From, from.

Verb

 * 1) fight

Noun

 * 1) lion

Etymology
From, from.

Verb

 * 1) to get, gain, obtain
 * 2)  perfective action marker
 * 3)  potential mood marker
 * 1)  potential mood marker

Noun

 * 1) fire