What does "provitamin" mean?

Any biologically inactive compound that may be converted into a vitamin within an animal organism

Provitamin

Common synonyms include: precursor vitamin, provitamin precursor, vitamin precursor, vitamin precursor compounds.

noun

noun ·Rare ·Advanced level

Noun

1
Any biologically inactive compound that may be converted into a vitamin within an animal organism
2
vitamin precursor; a substance that is converted into a vitamin in animal tissues wordnet

From pro- (“forward, facing, favouring, toward”) + vitamin.