I. noun — [ mass noun] 1. a hereditary condition in which the growth of long bones by ossification of cartilage is retarded, resulting in very short limbs and sometimes a face which is small in relation to the skull. II. derivatives 1. achondroplasic adjective
2. achondroplastic adjective
– origin late 19th cent.: from a-1 ‘without’ + Greek khondros ‘cartilage’ + plasis ‘moulding’ + -ia1.