- A multicellular organism is an organism that consists of more than one cell, in contrast to unicellular organism. All species of animals, land plants and most fungi are multicellular, as are many algae, whereas a few organisms are partially uni- and partially multicellular, like slime molds and social amoebae such as the genus Dictyostelium.
Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD:
Malachi 4:5 KJV