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.
Noun. 1. moron-a person of subnormal intelligence. changeling, cretin, half-wit, idiot, imbecile, retard. mongoloid-a person suffering from Down syndrome (no longer used technically in this sense). simpleton, simple-a person lacking intelligence or common sense.