Etheria
noun
Ethe·ria
ə̇ˈthirēə,
ēˈ-,
eˈ-,
-thēr-
: 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
Word History
Etymology
New Latin, from Latin aetheria, feminine of aetherius ethereal