RoussetteRous*sette"\, n. [F.; -- so called in allusion to the color. See Russet.]1. (Zo["o]l.) A fruit bat, especially the large species (Pieropus vulgaris) inhabiting the islands of the Indian ocean. It measures about a yard across the expanded wings. 2. (Zo["o]l.) Any small shark of the genus Scyllium; -- called also dogfish. See Dogfish.