ge ‧ ra ‧ ni ‧ um /dʒəˈreɪniəm/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Latin ; Origin: Greek geranion , from geranos 'crane' ; because the plant's seed-case looks like a crane's long beak ]
a plant with red, pink, or white flowers and round leaves