[Middle English, from Late Latin lascīviōsus, from Latin lascīvia, lewdness, playfulness, from lascīvus, lustful, playful; see las- in Indo-European roots.] las·civ'i·ous·ly adv., las·civ'i·ous·ness n.
Main Entry: las·civ·i·ous Pronunciation: l&-'si-vE-&s Function: adjective : reflecting or producing sexual desire or behavior esp. that is considered indecent or obscene lascivious behavior>