Defn: Consisting of but a single term or expression.

MONOMORPHIC; MONOMORPHOUS
Mon`o*mor"phic, Mon`o*mor"phous, a. Etym: [Mono- + Gr. (Biol.)

Defn: Having but a single form; retaining the same form throughout the various stages of development; of the same or of an essentially similar type of structure; — opposed to dimorphic, trimorphic, and polymorphic.

MONOMPHALUS
Mo*nom"pha*lus, n. Etym: [NL., fr. Gr.

Defn: A form of double monster, in which two individuals are united by a common umbilicus.

MONOMYA; MONOMYARIA
Mo*no"my*a, Mon`o*my*a"ri*a, n.pl. Etym: [NL., fr. Gr. (Zoöl.)

Defn: An order of lamellibranchs having but one muscle for closing the shell, as the oyster.

MONOMYARIAN; MONOMYARY
Mon`o*my"a*ri*an, Mon`o*my"a*ry, a. (Zoöl.)

Defn: Of or pertaining to the Monomya.
— n.

Defn: One of the Monomya.