Dictionary
yel'low-green al'gae
Biol.
a group of common single-celled and colonial algae of the phylum Chrysophyta, having mostly yellow and green pigments, occurring in soil and on moist rocks and vegetation and also as a slime or scum on ponds and stagnant waters.
Also,yel'low green" al'gae.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.