the 11th letter of the Greek alphabet (Λ, λ), a consonant transliterated as l
Word origin
C14: from Greek, from Semitic; related to lamed
lambda in American English
(ˈlæmdə)
noun
1.
the eleventh letter of the Greek alphabet (Λ, λ)
2. Particle Physics
an uncharged hyperon with a mass of c. 1,115.68 MeV/c, which is c. 2,183 times the mass of an electron: it decays very rapidly, usually into a nucleon and a pion
: sometimes called lambda particle, lambda hyperon