Definition of "costal" [cos•tal]

• Pertaining to a rib. (adjective)

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• "In women the action of the ribs as they rise and fall, is emphasized more than in men, and this we call costal breathing."
• "They actually have Toro, and several other that I have only seen in DC or other "costal" towns that can get it easily."
• "For example, areas where pinnipeds seals and sea lions have pupping grounds, and often costal points outside of kelp beds, are "hot spots" off California, says Professor Cailliet."