These animals calcify to strengthen their shells and thereby their suit of armour.
From the sciencedaily.com
They can last for a decade or more, but may calcify and wear out eventually.
From the latimes.com
Because aging voices tend to calcify, singers usually don't get better as they get older.
From the newsobserver.com
Their intervertebral disc material can calcify and become more brittle.
From the en.wikipedia.org
The thing that she has allowed to kind of calcify in her, this belief that she's a broken person.
From the tmagazine.blogs.nytimes.com
Once obtained, you cannot let Board chemistry calcify.
From the avc.com
Before the beginning of a species'mating season, the antlers calcify under the velvet and become hard bone.
From the en.wikipedia.org
They can cavitate, calcify, or develop air-fluid levels.
From the en.wikipedia.org
Doctors found that the bone in her left elbow had been broken and the muscle and tendons had begun to calcify.
From the sacbee.com
More examples
Become impregnated with calcium salts
Become inflexible and unchanging; "Old folks can calcify"
Turn into lime; become calcified; "The rock calcified over the centuries"
(calcification) tissue hardened by deposition of lime salts
(calcification) an inflexible and unchanging state; "the calcification of negotiations"
(Calcification) the process by which corals extract calcium from seawater and create calcium carbonate.
(calcification) A soil process where the surface soil is combined with calcium by the decomposition of plants, especially if a calcareous layer is formed. See also: podzolization.
(Calcification) A process that occurs when tissue or noncellular material in the body becomes hardened by deposits of calcium salts. [See: Fluoride & Osteoarthritis | Fluorosis & Spondylosis/Spondylitis | Fluorosis & DISH ]
(Calcification) The body's attempt to render invading bacteria harmless by coating them with calcium. This can result in prostate stones which may cause problems of their own. Small stones may migrate out of the prostate into the urethra causing "sand" in the urine.