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 , might be represented by a particular column vector. Its corresponding bra, , 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
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