lambda

lamb·da

noun \ˈlam-də\

Definition of LAMBDA

1

: the 11th letter of the Greek alphabet — see alphabet table

2

: an uncharged unstable elementary particle that has a mass 2183 times that of an electron and that decays typically into a nucleon and a pion

Origin of LAMBDA

Middle English, from Greek, of Semitic origin; akin to Hebrew lāmedh lamed

First Known Use: 15th century