n. - One of the small cuplike cavities, often with elevated
borders, covering the surface of most corals. Each is formed by a
polyp. (b) One of the cuplike structures inclosing the zooids of
certain hydroids. See Campanularian.
n. - One of the small cuplike cavities, often with elevated
borders, covering the surface of most corals. Each is formed by a
polyp. (b) One of the cuplike structures inclosing the zooids of
certain hydroids. See Campanularian.