gibberellin
Concise Oxford English Dictionary © 2008 Oxford University Press:
gibberellin /ˌdʒɪbəˈrɛlɪn/
▶noun any of a group of plant hormones that stimulate stem elongation, germination, and flowering.
– origin 1930s: from mod. L. Gibberella, dimin. of the genus name Gibbera, from L. gibber ‘hump’, + -in1.
'gibberellin' also found in these Oxford entries:

