mə̇ˌzembrēˈan(t)thəməm noun
Etymology: New Latin, from Greek mesēmbria midday, noon (from mes- + hēmera day) + New Latin -anthemum — more at hemera
1. capitalized : a genus of chiefly southern African herbs or subshrubs (family Aizoaceae) having fleshy leaves and flowers with a gamosepalous calyx and a capsular fruit
2. -s : any plant of the genus Mesembryanthemum