suffix also-logy [in nouns]
[Origin: -logy]
the study of something, especially something scientific
　geology (=the study of rocks and the Earth)
　climatology (=the study of climate)
　Egyptology (=the study of ancient Egypt)
the things studied by a particular science
　The geology (=structure of the rocks etc) of north Devon is particularly interesting.
>-ological [əlɔdʒɪkəl (US) -lɑː-/