Labium

Labium is the Latin word for lip. In English, it may refer to:
 * Labium (botany), a modified petal in certain monocot flowers, which attracts insects for pollination
 * Labium (arthropod mouthpart), a mouthpart of arthropods (the lower "lip")
 * Labium (wasp), a genus of wasps in the subfamily Labeninae of the family Ichneumonidae
 * Labium (wind instrument), a part of wind instruments, such as the flue pipe or the recorder; see

Labia is the plural of labium. It may refer to:
 * Labia, a part of the vulva
 * Labia (earwig), a genus of earwigs in the family Labiidae
 * Fausta Labia (1870–1935), Italian operatic soprano
 * Maria Labia (1880–1912), Italian operatic soprano, sister of Fausta
 * Labia family, a noble family of Venice