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Definition of Gibberellins
1. gibberellin [n] - See also: gibberellin
Medical Definition of Gibberellins
1. A class of plant growth hormone isolated from cultures of gibberella fujikuroi, a fungus causing bakanae disease in rice. There are many different members of the family as well as mixtures of multiple members; all are diterpenoid acids based on the gibberellane skeleton. (12 Dec 1998)