ˌhīdrəˈfiləˌdē noun plural
Usage: capitalized
Etymology: New Latin, from Hydrophilus, type genus (from hydr- + -philus ) + -idae
: a large family of diving beetles that are mostly of scavenging or predaceous habits and of elliptical form and black color and that live chiefly in quiet pools and carry with them a film of air for respiration