ostrich dinosaur
noun
1- a lightly built toothless bipedal dinosaur of the late Cretaceous period, adapted for running and somewhat resembling an ostrich鸟龙, 似鸡龙。亦称ORNITHOMIMOSAUR.
1.1
- Infraorder Ornithomimisauria, suborder Theropoda, order Saurischia: several genera, including Gallimimus, Ornithomimus, and Struthiomimus.似鸟龙下目, 兽脚亚目, 蜥臀目：数属, 包括似鸡龙, 似鸟龙属和似鸵龙属。