Definition of monohalogenated in US English:
monohalogenated
adjective
Chemistry
Containing one atom of a halogen substituted for another atom or group (usually hydrogen).
Origin
Early 20th century; earliest use found in Chemical News. From mono- + halogenated.
Pronunciation
monohalogenated
/ˌmɒnə(ʊ)ˈhalədʒəneɪtɪd/