Home › Words › H › helianthushelianthus/ˌhiːliːˈænθəs/helianthus means any plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowers.helianthus is pronounced /ˌhiːliːˈænθəs/.EtymologyFrom the genus name. Compare helio- (“sun”), antho- (“flower”).nounAny plant, of the genus Helianthus, having large flower heads with dark disk florets and showy yellow rays; the sunflowersDefinitions & examples from Wiktionary (CC BY-SA 3.0).Words closest in meaningBy meaning, not spelling — each word's AI semantic fingerprint, nearest first.helichrysum 64% match — Any of the genus Helichrysum of plants related to the sunflower. vs helianthus →helianthoid 62% match — Of or pertaining to the Helianthoidea, an obsolete subdivision of zoophytes, certain sea anemones and similar species vs helianthus →sunflowery 62% match — Resembling or characteristic of a sunflower. vs helianthus →sunflowered 61% match — Covered with sunflowers. vs helianthus →sunbloom 60% match — Synonym of sunflower. vs helianthus →tithonia 60% match — Any of the genus Tithonia of flowering plants in the sunflower tribe (Heliantheae) within the family Asteraceae. vs helianthus →chrysanthemum 59% match — Any of many flowering perennial plants, of the genus Chrysanthemum, native to China, that have showy radiate heads. vs helianthus →coreopsis 58% match — Any of several composite herbs, of genus Coreopsis, typically with bright yellow flowers. vs helianthus →