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ostosis

American  
[o-stoh-sis] / ɒˈstoʊ sɪs /

noun

Physiology.
  1. the formation of bone; ossification.


ostosis British  
/ ɒsˈtəʊsɪs /

noun

  1. the formation of bone; ossification

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of ostosis

From New Latin; oste-, -osis