Noun
A colloquial or humorous name for any science or branch of knowledge.
Source: Webster's dictionaryThe meaning of the word comes from the suffix "-ology", which means "study of", derived from Greek, and the stem "soci-", which is from the Latin word socius, meaning "companion", or society in general. Source: Internet
The term is parallel to "-ology" in English, being used to construct the names of academic fields: the Chinese names of fields such as physics, chemistry, biology, political science, economics, and sociology all end in xué. Source: Internet