Cetecosaurus (kētos, 'whale;' sauros, 'lizard'), a large dinosaurian reptile belonging to the Jurassic System (q.v.). According to Professor
Phillips, it may have reached a length of 50 feet, and when 'standing at ease' was probably not less than 10 feet in height and of a bulk in proportion. It appears to have frequented the marshes and river-sides of the period, and to have been a vegetable-feeder. The word is also spelt Cetiosaurus.