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.
Soon after the cells of the mammalian morula differentiate, the trophoblast cells secrete fluid into the center of the morula to create a fluid-filled space inside, called the blastocoel. Now that the embryo has taken the form of a hollow ball of cells, it is called a blastula.The trophoblast cells remain in a single outer layer surrounding the blastocoel, and the cells of the ICM form a mass of cells on the inner surface on one side of the blastula.he first division occurs about a day after fertilization, and subsequent divisions occur every 12 to 24 hours after that. The zygote divides several times to form a mass of cells called a morula, which is an embryonic stage consisting of a solid, compact mass of 16 or more cells.