Dictionary.net

• In bot., an offshoot or germinating bud attached by a thickish stalk to the parent plant.

1874 - Etymological and pronouncing dictionary of the English language
By Stormonth, James, Phelp, P. H.

• A bud or shoot capable of developing into an adult.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.