girasole
noun
gir·a·sole ˈjir-ə-ˌsȯl 
-ˌsōl,
-ˌsäl
variants or less commonly girasol
1
: jerusalem artichoke
2
usually girasol : an opal of varying color that gives out fiery reflections in bright light
Word History
Etymology
Italian girasole sunflower, from girare + sole sun, from Latin sol — more at solar
First Known Use
circa 1586, in the meaning defined at sense 1