KET

Etymology 1

Noun

ket (plural kets)

(physics) A vector, in Hilbert space, especially as representing the state of a quantum mechanical system; the complex conjugate of a bra; a ket vector. Symbolised by |...〉.

A particular ket, say $\backslash (|A\backslash rangle\backslash )$, might be represented by a particular column vector. Its corresponding bra, $\backslash (\backslash langle\; A|\backslash )$, would then be represented by the row vector which is the transpose conjugate of that column vector.

Etymology 2

Noun

ket (countable and uncountable, plural kets)

(Northern England) Carrion; any filth.

(Northumbria) Sweetmeats.

(Geordie) A sweet, treat or candy.

Etymology 3

Abbreviation.

Noun

ket (uncountable)

(colloquial) ketamine

Etymology 4

Noun

ket (uncountable)

(Scotland) matted wool

Noun

Ket (plural Kets or Ket)

A member of a people of Krasnoyarsk Krai in Central Siberia, Russia.

Proper noun

Ket

The Yeniseian language of this people.

Source: Wiktionary

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Ket, n. Etym: [Icel. kjöt flesh; akin to Sw. kött, Dan. kjöd.]

Definition: Carrion; any filth. [Prob. Eng.] Halliwell.

Source: Webster’s Unabridged Dictionary 1913 Edition

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