calcitriol
Americannoun
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Biochemistry. a vitamin D compound, C 27 H 44 O 3 , occurring in humans as a hormone derived from cholesterol, that acts in the regulation and absorption of calcium.
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Pharmacology. a preparation of this compound, used in the treatment of osteoporosis and bone fracture.
Etymology
Origin of calcitriol
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Example Sentences
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In the liver, cholecalciferol is converted to an intermediate that travels to the kidneys and is further converted to calcitriol, the active form of vitamin D3.
From Textbooks • Jun. 19, 2013
Additionally, calcitriol, the active form of vitamin D, is produced by the kidneys and stimulates the absorption of calcium and phosphate from the digestive tract.
From Textbooks • Jun. 19, 2013
It triggers the kidneys to inhibit the formation of calcitriol from vitamin D3 and to increase phosphorus excretion.
From Textbooks • Jun. 19, 2013
In the absence of calcium, levels of the hormone calcitriol increase.
From Time Magazine Archive
Among other things, calcitriol shuts off the mechanisms that break down fat and activates those that make it.
From Time Magazine Archive
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
