noun
: the dirty blue-green deposit on wave-dashed rocks at the water's edge caused by certain blue-green algae (especially of the genera Coelosphaerium and Microcystis )
noun
: the dirty blue-green deposit on wave-dashed rocks at the water's edge caused by certain blue-green algae (especially of the genera Coelosphaerium and Microcystis )
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012