Is a dilophosaurus poisonous

Ever since Jurassic Park, many people have thought that the Dilophosaurus (meaning double-crested lizard) was a three-foot-tall dinosaur that had rather large, retractable neck frills that would puff out whenever it felt threatened by something and spat blinding poison that looked like a black or a very dark brown tar-like substance. Michael Crichton, the author of Jurassic Park, just sized it down a little so the audience would not get confused with the Velociraptors.

To tell you the truth, there is not much evidence about the neck frills.

However, it did spit, but it did not spit blinding poison of any kind. I am not very sure of what it spat, though. It is possible that it may have had some sort of special instinct with its spit glands. Ours are located under our tongues, as you can see, if you gather some spit, you may notice that it feels like it is coming from under your tongue, but maybe the Dilophosaurus had its spit glands in a different spot than ours.

In that case, it is not poisonous, but if you mean poisonous by touch, no, it was not poisonous.