achondroplasia

noun Pathology.

1. defective conversion of cartilage into bone, especially at the epiphyses of long bones, producing a type of dwarfism.

noun

1. a skeletal disorder, characterized by failure of normal conversion of cartilage into bone, that begins during fetal life and results in dwarfism

n.

1. Improper development of cartilage at the ends of the long bones, resulting in a form of congenital dwarfism.osteosclerosis congenita