verb (used with object), verb (used without object), calcified, calcifying.
Physiology. to make or become calcareous or bony; harden by the deposit of calcium salts.
Geology. to harden by deposition of calcium carbonate.
to make or become rigid or intransigent, as in a political position.

1830–40; calci- + -fy

noncalcified, adjective
uncalcified, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
calcify (ˈkælsɪˌfaɪ)
vb , -fies, -fying, -fied
1.  to convert or be converted into lime
2.  to harden or become hardened by impregnation with calcium salts

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1785 (implied in calcified), from Fr. calcifier, from stem of L. calcem "lime" + -fy. Related: Calcification.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

calcify cal·ci·fy (kāl'sə-fī')
v. cal·ci·fied, cal·ci·fy·ing, cal·ci·fies
To make or become stony or chalky by deposition of calcium salts.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Tiny bits of food get caught up in that calcified bacterial sludge, where they
  can remain for millennia without disintegrating.
They are highly elastic, but may become calcified in advanced life.
Many sea creatures suffer as lowered pH dissolves their calcified shells.
The limestone is the fossilized and calcified remains of those creatures.
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