2. Any irksome sameness, or want of variety. At sea, everything that breaks the monotony of the surrounding expanse attracts attention. W. Irving.

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.

MONOTREMATOUS
Mon`o*trem"a*tous, a. (Zoöl.)

Defn: Of or pertaining to the Monotremata.

MONOTREME
Mon"o*treme, n. Etym: [Cf. F. monotrème.] (Zoöl.)

Defn: One of the Monotremata.

MONOTRIGLYPH
Mon`o*tri"glyph, n. Etym: [Mono- + triglyph: cf. F. monotriglyphe.]
(Arch.)

Defn: A kind of intercolumniation in an entablature, in which only one triglyph and two metopes are introduced.

MONOTROPA
Mo*not"ro*pa, n. Etym: [NL., fr. Gr. (Bot.)