molly
Concise Oxford English Dictionary © 2008 Oxford University Press:
molly /ˈmɒli/ (also mollie)
▶noun (pl. mollies) a small live-bearing killifish which has been bred for aquaria in many colours, especially black. [Genus Poecilia: several species.]
– origin 1930s: from mod. L. Mollienisia (former genus name), from the name of Count Mollien, French statesman.
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