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.
[1913 Webster]