n.
Pronunciation: ' o ̇ k-s ə n
Function: noun
Etymology: International Scientific Vocabulary, from Greek auxein to increase ― more at EKE
Date: 1934
1 : any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (as root initiation): as a : INDOLEACETIC ACID b : any of various synthetic substances (as 2,4-D) resembling indoleacetic acid in activity and used especially in research and agriculture
2 : PLANT HORMONE
– aux · in · ic \ o ̇ k- ' si-nik \ adjective