ə̇ˈthirēə, ēˈ-, eˈ-, -thēr- noun
Usage: capitalized
Etymology: New Latin, from Latin aetheria, feminine of aetherius ethereal — more at ethereal
: a genus (the type of the family Etheriidae) of freshwater lamellibranch mollusks of Africa and Madagascar that attach themselves by one valve to rocks in deep water