ˌhēlēˈan(t)thəməm noun
Etymology: New Latin, from heli- (I) + -anthemum
1. capitalized : a geus of Eurasian herbs or undershrubs (family Cistaceae) having showy variously colored flowers with fugacious petals
2. -s : any plant of the genus Helianthemum — called also rockrose, sunrose