Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  habitus(noun) person's predisposition to be affected by something (as a disease) the consumptive habitus. 2  physique, build, body-build, habitus(noun) constitution of the human body.
A mineral is a naturally occurring substance, representable by a chemical formula, that is usually solid and inorganic, and has a crystal structure. It is different from a rock, which can be an aggregate of minerals or non-minerals and does not have a specific chemical composition.
Rocks are naturally formed, consolidated material composed of grains of one or more minerals. Geologists group rocks into three categories depending on their origin: igneous, sedimentary and metamorphic.A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure. Igneous rocks are formed from solidification of molten material.eologists group rocks into three categories depending on their origin: igneous, sedimentary and metamorphic. A mineral is defined as a naturally occurring, crystalline solid of definite chemical composition and a characteristic crystal structure.