Also known as: IR., IR-
IR stands for various terms. Discover the full forms, meanings, and possible interpretations of IR across different fields and industries.
A rock type that has been created from super-heated magma. The three main types of rock are igneous, sedimentary, and metamorphic. Igneous rock is rock formed when molten rock cools down and solidifies. Rock that at one time was molten and part of magmas or lavas and that then cooled.
Last updated: