sociolinguistics
Concise Oxford English Dictionary © 2008 Oxford University Press:
sociolinguistics/səʊsiəʊlɪŋˈɡwɪstɪks/
▶plural noun [treated as sing.] the study of language in relation to social factors.
– derivatives
sociolinguist noun,
sociolinguistic adjective,
sociolinguistically adverb.
sociolinguist noun,
sociolinguistic adjective,
sociolinguistically adverb.
'sociolinguistics' also found in these Oxford entries:

