Noun
hydrohalogenation (countable and uncountable, plural hydrohalogenations)
English Wikipedia has an article on:hydrohalogenationWikipedia
(chemistry) The electrophilic addition of hydrohalic acids to alkenes to yield the corresponding haloalkanes.
Hydrohalogenation gives the corresponding vinyl halides or alkyl dihalides, again depending on the number of equivalents of HX added. Source: Internet