Ectostosis
Pronunciation : Ec`tos*to"sis
Part of Speech : n.
Etymology : [NL. See Ect-, and Ostosis.] (Physiol.)
Definition : Defn: A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage.
Source : Webster's Unabridged Dictionary, 1913