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.
Words that include: mort -, mor-, mori- (Latin: death, dead). abmortal : Situated or directed away from a dead or injured part; applied especially to electric currents set up in injured tissue. admortal : Moving toward damaged tissue; applied to an electric current.