Sunflower (noun)
Any plant of the genus Helianthus, so called probably from the form and color of its floral head, having the form of a large disk surrounded by yellow ray flowers.
Sunflower (noun)
A bright yellow, like that of the flower petals.
“color panel|FFB324”
Sunflower (noun)
Any flat, radially symmetric organic compound such as coronene
Marigold (noun)
Any of the Old World plants, of the genus Calendula, with orange, yellow or reddish flowers.
Marigold (noun)
Any of the New World plants, of the genus Tagetes, with orange, yellow or reddish flowers.
Marigold (noun)
(rubber glove for cleaning)
Marigold (adjective)
Having the color of marigolds, a bright yellowish-orange hue.
Wiktionary