formation of granite or closely related rocks by metamorphic processes, as opposed to igneous processes in which such rocks form from a melt, or ... Found on http://www.britannica.com/eb/a-z/g/59
A metamorphic process by which solid rock is converted into granite by the addition or removal of material, without passing through a magmatic stage. compare metasomatism . Found on https://www.encyclo.co.uk/local/22327