a gold and black butterflyfish, Holocanthus tricolor, ranging from the West Indies to Brazil.
noun 1. a prickleback, Xiphister mucosus, of the Pacific coast from southern California to Alaska.
noun, Mining, Civil Engineering. 1. a steel or fiberglass bolt inserted and anchored in a hole drilled in rock to prevent caving of the roof of a tunnel or subterranean chamber.
- Rock boot
noun 1. a tight-fitting rock-climbing boot with a canvas or suede upper and smooth rubber sole, designed to give good grip on small holds
- Rock borer
noun 1. any of various sea creatures that bore into rock, such as some sea urchins, sponges, annelid worms, barnacles, isopods, and molluscs