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.
Medical Definition of BLASTULA. : an early metazoan embryo typically having the form of a hollow fluid-filled rounded cavity bounded by a single layer of cellsâcompare gastrula, morula. â blasÂ·tuÂ·lar \-lÉr\ adjective.efinition of BLASTULA. : an early metazoan embryo typically having the form of a hollow fluid-filled rounded cavity bounded by a single layer of cells â compare gastrula, morula.