Giganotosaurus Facts By the way here's how to pronounce it properly Giga-No-toe-Sore-Us The reason why its pronounced that is because they even call it that in JWD, and it's short name is "Giga" It's not "Gi-Gan-Toe-Sore-Us or Jig-a-no-toe-sore-us or Gig-an-toe-sore-us. Its Giga-no-toe-sore-us