family Zosteraceae
— Noun
– English
～ used in some classifications: essentially equivalent to Potamogetonaceae
family Zygnemataceae
— Noun
– English
～ pond scums: common freshwater algae forming green slimy masses
family Zygophyllaceae
— Noun
– English
～ small trees, shrubs, and herbs of warm arid and saline regions; often resinous; some poisonous: genera Zygophyllum, Tribulus, Guaiacum, Larrea