1) Dwarfism 
(nan″o-so´me-ә) dwarfism.
nanosoma, nanosomia Dwarfism; the state of being a dwarf; underdevelopment of the body or some part of the body. A dwarf is defined as a person who is unusually short, particularly one of atypical proportions; also called, a nanus. It also includes an animal or plant that is abnormally small in size. ...