vitamin K
noun
1
: either of two naturally occurring fat-soluble vitamins essential for the clotting of blood because of their role in the production of clotting factors in the liver:
a
or vitamin K1
: the vitamin C31H46O2 that is produced by plants and obtained especially from green leafy vegetables (such as collards and kale)
b
or vitamin K2
: the vitamin C41H56O2 that is produced by bacteria (as in the intestines of animals) and obtained especially from meat and fermented foods
2
a
or vitamin K3
: menadione
b
: any of several synthetic compounds chemically related to menadione
Examples of vitamin K in a Sentence
Recent Examples on the Web
The vitamin K in grapes helps with blood clotting and bone health.
—
Heather Jones, Verywell Health, 9 Oct. 2024
When prothrombin levels are low, vitamin K may be prescribed to prevent bleeding.
—Allison Herries, Verywell Health, 7 Oct. 2024
Adding too much vitamin K to your diet can reduce its effects.
—Mary Choy, Verywell Health, 5 Sep. 2024
The high vitamin K levels in these types of veggies can make the drugs less efficient at preventing blood clots.
—Katie Camero, SELF, 13 Sep. 2024
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Heather Jones, Verywell Health, 9 Oct. 2024
When prothrombin levels are low, vitamin K may be prescribed to prevent bleeding.
—Allison Herries, Verywell Health, 7 Oct. 2024
Adding too much vitamin K to your diet can reduce its effects.
—Mary Choy, Verywell Health, 5 Sep. 2024
The high vitamin K levels in these types of veggies can make the drugs less efficient at preventing blood clots.
—Katie Camero, SELF, 13 Sep. 2024
See all Example Sentences for vitamin K
Dictionary Entries Near vitamin K
Cite this Entry
“Vitamin K.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vitamin%20K. Accessed 23 Nov. 2024.
Copy CitationMedical Definition
vitamin K
noun1
: either of two naturally occurring fat-soluble naphthoquinone vitamins essential for the clotting of blood because of their role in the production of clotting factors in the liver:
a
or vitamin K1
: a yellow oily vitamin C31H46O2 that is produced by plants and obtained especially from green leafy vegetables (such as collards and kale) and is often used to treat hypoprothrombinemia
called also phylloquinone, phytonadione
b
or vitamin K2
: a pale yellow crystalline vitamin C41H56O2 that is produced by bacteria (as in the intestines of animals) and obtained especially from meat and fermented foods and that typically has greater bioavailability than vitamin K1
called also menaquinone
2
a
or vitamin K3
: menadione
b
: any of several synthetic compounds chemically related to menadione
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