The Collaborative International Dictionary
gibberellin A3
gibberellic acid \gibberellic acid\ n. (Chem.),
A plant growth hormone of the gibberellin series
( C19H22O6), also called gibberellin A3. It was first
isolated from the fungus Gibberella fujikuroi. It is used
to promote the growth of seedlings. See also gibberellin.
--MI11
gibberellin A3
gibberellin \gibberellin\ n. (Chem.), Any of a number plant growth hormones, the first of which was isolated in 1938 from the fungus Gibberella fujikuroi; more than 60 related gibberelins are known. The most important is gibberellin A3, also called gibberellic acid. They are used in agriculture for promoting plant growth.