[ os-tee-uh-blast ]
/ ˈɒs ti əˌblæst /

noun Anatomy.

a bone-forming cell.

Origin of osteoblast

First recorded in 1870–75; osteo- + -blast


os·te·o·blas·tic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for osteoblast

/ (ˈɒstɪəʊˌblæst) /


a bone-forming cell

Derived forms of osteoblast

osteoblastic, adjective
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

Medical definitions for osteoblast

[ ŏstē-ə-blăst′ ]


A cell from which bone develops; a bone-forming cell.

Other words from osteoblast

os′te•o•blastic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for osteoblast

[ ŏstē-ə-blăst′ ]

A specialized bone cell that produces and deposits the matrix that is needed for the development of new bone and consists primarily of collagen fibers. Osteoblasts are formed from osteoclasts on the outer surfaces of bone and in bone cavities, and bone deposition takes place constantly in living bone. As new bone grows and hardens with the addition of calcium and phosphate, osteoblasts become embedded in the bone matrix and develop into osteocytes.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.