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Webster 1913 Edition

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Noun.

[NL. See

, and

(Physiol.)

A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage.

ectostosis ‎(plural ectostoses)

(physiology) A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage.