Professor Cuthbert Calculus (French: Professeur Tryphon Tournesol, meaning "Professor Tryphon Sunflower"), is a fictional character in The Adventures of Tintin, the comics series by Belgian cartoonist Hergé. He is Tintin's friend, an absent-minded professor and half-deaf physicist, who invents many sophisticated devices used in the series, such as a one-person shark-shaped submarine, the Moon rocket, and an ultrasound weapon.