gibberellin

noun

gib·​ber·​el·​lin ˌji-bə-ˈre-lən 

: any of several growth-regulating plant hormones that promote cell elongation and activity of the cambium, induce parthenocarpy, and stimulate synthesis of nucleic acids and proteins

Examples of gibberellin in a Sentence

Recent Examples on the Web

Researchers have worked out that such seeds resist germination by maintaining a certain balance of two plant hormones—abscisic acid and gibberellin—inside the seed. —Katarina Zimmer, Smithsonian Magazine, 2 May 2025

Powdered Kelp Meal: Another all-natural powerhouse, this powder increases natural plant growth hormones such as auxins, cytokines, and gibberellins (aka: powerful plant hormones). —Kristin Guy, Sunset Magazine, 28 Feb. 2023

The seed has two hormones: abscisic acid (ABA), which sends the signal to stay dormant, and gibberellin (GA), which initiates germination. —Jason Daley, Smithsonian, 9 June 2017

The seed has two hormones: abscisic acid (ABA), which sends the signal to stay dormant, and gibberellin (GA), which initiates germination. —Jason Daley, Smithsonian, 9 June 2017

Word History

Etymology

New Latin Gibberella fujikoroi, fungus from which it was first isolated

First Known Use

1939, in the meaning defined above

Rhymes for gibberellin

• endothelin
• watermelon
• felon
• melon
• snellen
• tellin
• muskmelon

Kids Definition

gibberellin

noun

gib·​ber·​el·​lin ˌjib-ə-ˈrel-ən 

: any of several chemical substances that regulate the growth of plants