Labiums

Labium La"bi*um, n.; pl. L. {Labia}, E. {Labiums}. [L.] 1. A lip, or liplike organ. [1913 Webster]

2. The lip of an organ pipe. [1913 Webster]

3. pl. (Anat.) The folds of integument at the opening of the vulva. [1913 Webster]

4. (Zo["o]l.) (a) The organ of insects which covers the mouth beneath, and serves as an under lip. It consists of the second pair of maxill[ae], usually closely united in the middle line, but bearing a pair of palpi in most insects. It often consists of a thin anterior part (ligula or palpiger) and a firmer posterior plate (mentum). (b) Inner margin of the aperture of a shell. [1913 Webster]