ˌhed.ə(ˌ)rōˌjenəˈräd.(ˌ)ē, -ˈrād.(ˌ)ē noun plural
Usage: capitalized
Etymology: New Latin, from heter- + Latin generatae (feminine plural of generatus, past participle of generare to generate) — more at generate
: a class of brown algae including those having two alternating generations unlike in vegetative structure, the larger sporophyte being often macroscopic and the smaller gametophyte usually microscopic — compare isogeneratae