xanthophyll
Concise Oxford English Dictionary © 2008 Oxford University Press:
xanthophyll /ˈzanθə(ʊ)fɪl/
▶noun Biochemistry a yellow or brown carotenoid plant pigment which causes the autumn colours of leaves.
– origin C19: from Gk xanthos ‘yellow’ + phullon ‘leaf’.
'xanthophyll' also found in these Oxford entries:

