The Collaborative International Dictionary
Lambda moth
Lambda \Lamb"da\, n. [NL., fr. Gr. la`mbda.]
The name of the Greek letter [Lambda], [lambda], corresponding with the English letter L, l.
(Anat.) The point of junction of the sagittal and lambdoid sutures of the skull.
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(Phys.) A subatomic particle carrying no charge, having a mass equal to 2183 times that of an electron; it decays rapidly, typically forming a nucleon and a pion.
--MW10Lambda moth (Zo["o]l.), a moth so called from a mark on its wings, resembling the Greek letter lambda ([Lambda]).