tə̇ˌläptərəˈdā(ˌ)lēz noun plural
Usage: capitalized
Etymology: New Latin, from Tilopterid-, Tilopteris, genus of algae (from Greek tilos something plucked — from tillein to pluck — + pteris fern) + -ales — more at pteris
: an order of brown algae (class Isogeneratae) resembling those of the genus Ectocarpus but with the cells of the prostrate lower portion of the thallus arranged in transverse tiers