[hee-lee-an-thin, -theen] /ˌhi liˈæn θɪn, -θin/
[hee-lee-an-thuh s] /ˌhi liˈæn θəs/ noun, plural helianthuses. 1. any composite plant of the genus Helianthus, comprising the sunflowers. /ˌhiːlɪˈænθəs/ noun (pl) -thuses 1. any plant of the genus Helianthus, such as the sunflower and Jerusalem artichoke, typically having large yellow daisy-like flowers with yellow, brown, or purple centres: family Asteraceae (composites)
noun 1. (NZ) the sport of snowboarding on mountains or glaciers accessible only by helicopter or skiplane
[hel-uh-bawrn, -bohrn] /ˈhɛl əˌbɔrn, -ˌboʊrn/ adjective 1. transported by helicopter: heliborne troops.
1. variant of before a vowel: helical.