lambda, n. [NL., fr. Gr. la`mbda.].
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The name of the Greek letter 1913 Webster]
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The point of junction of the sagittal and lambdoid sutures of the skull. [1913 Webster]
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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. [PJC]
Lambda moth (Zoöl.), a moth so called from a mark on its wings, resembling the Greek letter lambda (