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Webster's 1913 Dictionary
MONOTREMATA
Mon
`o *
trem
"a *
ta,
n.
pl.
Etym:
[
NL.
,
fr.
Gr.
(Zoöl.)
Defn: A
subclass
of
Mammalia,
having
a
cloaca
in
which
the
ducts
of
the
urinary,
genital,
and
alimentary
systems
terminate,
as
in
birds.
The
female
lays eggs
like
a
bird.
See
Duck
mole,
under
Duck,
and
Echidna.