noun. ['ˈgrɔɪn'] the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals.
noun. ['ˈgrɔɪn'] a curved edge formed by two intersecting vaults.
verb. ['ˈgrɔɪn'] build with groins.
noun. ['ˈgrɔɪn'] a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away.