Nope! All known dinosaurs are at least partially terrestrial. Most don't seem to have much of any aquatic adaptations. read more
There are a handful of dinosaur groups that are semi-aquatic: Spinosaurus was semi-aquatic, as you pointed out, and some of its relatives may have been as well; Hesperornis and its relatives were a very specialized group of ancient birds, which may have spent most of their time in water; similarly, more familiar examples of semi-aquatic dinosaurs include ducks, geese, diving birds, penguins, and plenty more. read more
Thanks for the thorough answer. Interesting to learn that there are no non-avian, fully aquatic dinosaurs yet discovered in the fossil record. I wonder why it didn't seem to happen. Also, since you seem to be knowledgeable about such things, maybe you can answer a related question. read more