‖Lamb″da (?), n. [NL., fr. Gr. λάμβδα.] 1. The name of the Greek letter Λ, λ, corresponding with the English letter L, l.
2. (Anat.) The point of junction of the sagittal and lambdoid sutures of the skull.
Lambda moth(Zoöl.), a moth so called from a mark on its wings, resembling the Greek letter lambda (Λ).