Webster’s Revised Unabridged Dictionary · 1913
Monerula
Mo·ner′u·la (mō·nĕr′ū·lȧ), n. [NL., dim. of moner. See Monera.] (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. Haeckel.