ˌspändəlōˈmōrəm noun
Usage: capitalized
Etymology: New Latin, from spondyl- + Latin morum mulberry — more at mulberry
: a genus of colonial flagellates related to Volvox, having cells with four flagella, two contractile vacuoles, and a cup-shaped chromoplast, forming a 16-celled colony, and sometimes causing a contamination of water supplies