both refer to movie chains (i.e., Loews, AMC Theatres) with movie theatres that screen more than one film at a time, as opposed to single-screen theatres. A multiplex has from 2 up to 16 screens, a megaplex has 16 or more screens; plex is the abbreviation for a multiplex theatre.
A morula (Latin, morus: mulberry) is an early stage embryo consisting of cells (called blastomeres) in a solid ball contained within the zona pellucida.
Quick Answer. The uvula is the small piece of pink tissue that hangs down from the roof of a person's mouth near the throat. A uvula is an extension of the soft palate, and its purpose isn't fully understood. A uvula may help prevent food from entering the sinus cavity while a person eats, and it may assist with speech.