[la.bi.um] n, pl la.bia [NL, fr. L, lip--more at lip] (1634) 1: any of the folds at the margin of the vulva--compare labia majora, labia minora
2: the lower lip of a labiate corolla 3 a: a lower mouthpart of an insect that is formed by the second pair of maxillae united in the middle line b: a liplike part of various invertebrates