The Collaborative International Dictionary
Monerula
Monerula \Mo*ner"u*la\, 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.
Wiktionary
monerula
n. (context biology English) A germ in that stage of development in which its form is simply a non-nucleated mass of protoplasm.