| 释义 | 
		ul·va·ce·ae \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 |