aster yellows: Meaning and Definition of

as'ter yel'lows

Pronunciation: [key]
— Plant Pathol. Plant Pathol.
  1. a dwarfing and yellowing of asters and various other plants, caused by a mycoplasma transmitted by a leafhopper.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.