| alosa | (n) shad, Syn. genus Alosa |
| genus megalosaurus | (n) type genus of the Megalosauridae |
| megalosaur | (n) gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe, Syn. megalosaurus |
| megalosauridae | (n) megalosaurs, Syn. family Megalosauridae |
| pachycephalosaur | (n) bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found, Syn. pachycephalosaurus |
| suborder pachycephalosaurus | (n) boneheaded dinosaurs; late Cretaceous |
| alewife | (n) shad-like food fish that runs rivers to spawn; often salted or smoked; sometimes placed in genus Pomolobus, Syn. Pomolobus pseudoharengus, Alosa pseudoharengus |
| allice shad | (n) European shad, Syn. allis shad, allis, Alosa alosa, allice |
| common american shad | (n) shad of Atlantic coast of North America; naturalized to Pacific coast, Syn. Alosa sapidissima |
| river shad | (n) shad that spawns in streams of the Mississippi drainage; very similar to Alosa sapidissima, Syn. Alosa chrysocloris |