brachiosaurus
noun [ C ] uk/ˌbræk.i.əˈsɔː.rəs/ us/ˌbræk.i.əˈsɔːr.əs/
腕龙（一种大型草食性恐龙，有四条腿，脖子和尾巴很长，头很小，前肢长于后肢）
a very large plant-eating dinosaur with four legs, a very long neck and tail, and a small head. Its front legs were longer than its back legs.