nas ‧ tur ‧ tium /nəˈstɜːʃ ə m $ -ɜːr-/ BrE AmE noun [countable]
[ Date: 1100-1200 ; Language: Latin ; Origin: perhaps from nasus 'nose' + -turtium (from torquere 'to twist' ); because of its strong smell ]
a garden plant with orange, yellow, or red flowers and circular leaves