VITAMIN A

IPA (US):

 Dictionary entry overview: What does vitamin A mean? 

• VITAMIN A (noun)
  The noun VITAMIN A has 1 sense:

1. any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

  Familiarity information: VITAMIN A used as a noun is very rare.

 Dictionary entry details 

• VITAMIN A (noun)

Sense 1

Meaning:

Any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

Classified under:

Nouns denoting substances

Synonyms:

A; antiophthalmic factor; axerophthol; vitamin A

Hypernyms ("vitamin A" is a kind of...):

fat-soluble vitamin (any vitamin that is soluble in fats)

Hyponyms (each of the following is a kind of "vitamin A"):

retinol; vitamin A1 (an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene)

dehydroretinol; vitamin A2 (a viscous alcohol that is less active in mammals than is vitamin A1)

 Context examples 

Avage is related to vitamin A and is made in the laboratory.

(Avage, NCI Dictionary)

It is a type of retinoid, which are substances related to vitamin A.

(Fenretinide, NCI Dictionary)

Tretinoin is a form of vitamin A.

(Avita, NCI Dictionary)

It is a type of retinoid, which are substances related to vitamin A. Also called fenretinide Lym-X-Sorb.

(fenretinide LXS, NCI Dictionary)

It is a type of retinoid, which are substances related to vitamin A. Also called fenretinide LXS.

(fenretinide Lym-X-Sorb, NCI Dictionary)

Rough, dry, hypertrophic eruption of the skin associated with vitamin A deficiency.

(Phrynoderma, NCI Thesaurus)

It also facilitates production of a group of apocarotenoids—organic chemicals derived from carotenoids including vitamin A precursors—that work as signaling molecules influencing a variety of responses in plants including environmental stresses.

(Tomato Pan-Genome Makes Bringing Flavor Back Easier, Agricultural Research Service)

Also called all-trans retinoic acid, retinoic acid, tretinoin, and vitamin A acid.

(ATRA, NCI Dictionary)

A topical retinoid-like compound, chemically similar to vitamin A. Although the exact mechanism of action is unknown, adapalene binds to specific retinoic acid receptors in the nucleus, leading to specific gene expression.

(Adapalene, NCI Thesaurus)

All-trans retinoic acid is made in the body from vitamin A and helps cells to grow and develop, especially in the embryo.

(All-trans retinoic acid, NCI Dictionary)