mono-

a combining form meaning “alone,” “single,” “one” (monogamy); specialized in some scientific terms to denote a monomolecular thickness (monolayer) and adapted in chemistry to apply to compounds containing one atom of a particular element (monohydrate).
Also especially before a vowel, mon-.

Origin of mono-

< Greek, combining form of mónos alone

Words nearby mono-

monmouth, monmouthshire, monnet, monnion, mono, mono-, monoacetin, monoacid, monoalphabetic substitution, monoamide, monoamine

British Dictionary definitions for mono-

mono-

before a vowel mon-

combining form

one; single monochrome; monorail
indicating that a chemical compound contains a single specified atom or group monoxide

Word Origin for mono-

from Greek monos

Medical definitions for mono-

mono-

pref.

One; single; alone:monomorphic.
Monomolecular; monatomic:monolayer.
Containing one atom, molecule, or group:monomer.

Scientific definitions for mono-

mono-

A prefix that means “one, only, single,” as in monochromatic, having only one color. It is often found in chemical names where it means “containing just one” of the specified atom or group, as in carbon monoxide, which is carbon attached to a single oxygen atom.