waterberry noun5 •A number of plants of the genus Syzygium. •Guinea waterberry (Syzygium guineense), a tree native to sub-Saharan Africa. •The Forest waterberry (Syzygium gerrardii), a plant native to Africa. •The Mountain waterberry (Syzygium legatii), a plant native to the Northern Provinces of South Africa. •Komati waterberry (Syzygium komatiense) formswaterberries