ˌəlˈvāsēˌē noun plural
Usage: capitalized
Etymology: New Latin, from Ulva (I) , type genus + -aceae
: a widely distributed family of thin green algae having either a flat or a hollow tubular thallus, reproducing by the conjugation of planogametes or of zoospores, and being classed among the Ulotrichales or now more commonly placed in the order Ulvales
• ul·va·ceous | ̷ ̷|vāshəs adjective