n. [ Etymol. uncertain. ] (Zool.) A species of gull or tern. [ Prov. ] Lowell. [ 1913 Webster ]
a. See Octahedral. [ Obs. ] Sir T. Browne. [ 1913 Webster ]
a. Pentahedral. [ R. ] [ 1913 Webster ]
Polyhedral angle,
a. (Geom. & Crystallog.) Rhombohedral. [ 1913 Webster ]