Dictionary.net

A genus of tall, erect American herbs of the Compositae. The seeds yield oil and are used as food and animal feed; the roots of Helianthus tuberosum (Jerusalem artichoke) are edible.

A tall, straight plant of the aster family, with large yellow-rayed flowers.

A plant so called from its flower, which is a large disc with yellow rays.

Plant with large yellow flowers.

A plant of the genus helianthus-so called from its large disc with yellow rays, or from its habit of turning round and following the course of the sun.

n. A plant-so called from the form and the colour of its flower, which is a large disk with yellow rays, or from its habit of turning to the sun.