Monerula
Mo`ner´u`la
n. 1. (Biol.) A germ in that stage of development in which its form is simply that of a non-nucleated mass of protoplasm. It precedes the one-celled germ. So called from its likeness to a moner.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.