To convert into or become hardened by the deposit of calcium salts; to turn into a calcareous or stone-like substance.
From Latin 'calcis' (lime/calcium) + '-fy' (to make or become). The verb entered English in the 1700s as scientific understanding of mineral processes improved.
Your body is constantly calcifying your skeleton at an amazing rate—you're literally turning eaten foods (especially dairy) into solid bone that can support your weight and protect your organs, a process that rivals concrete in its engineering precision.
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