Longman Dictionary of Contemporary English
socio-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ socioeconomic factors
Douglas Harper's Etymology Dictionary
socio-
word-forming element meaning "social, of society; social and," also "having to do with sociology," from combining form of Latin socius "companion, ally, associate, fellow, sharer" (see social (adj.)). Common in compounds since c.1880.
Wiktionary
socio-
pre. (non-gloss definition: Forms terms relating to society.)