Dromiceiomimus ("emu mimic') was a swift bipedal ornithomimid dinosaur from the late Cretaceous period, about 80 million to 65 million years ago. It was probably omnivorous, as were most ornithomimids. It was a relative of Gallimimus. Many scientists now believe that Dromiceiomimus is a synonym of the more well-known Ornithomimus, as it lived in the same time and place and was very similar.
Dromiceiomimus has never appeared or mentioned in any Jurassic Park films or books, however it has appeared in Jurassic Park III: Park Builder