|Definition - A structural linguistics' term denoting the areas of linguistics that are concerned with the direct analysis of linguistic phenomena — e.g. phonology, grammar, and lexicology.|
Etymology - The term derives from the Greek mikros, small + linguistics.
Oxford English Dictionary - Its first citation is from 1949:
"The whole of the field concerned with language … we shall call Macrolinguistics. The three subdivisions we shall call Prelinguistics, Microlinguistics, Metalinguistics."
(G. L. Trager in Studies in Ling.: Occasional Papers i. 2 )