ˌ ̷ ̷ ̷ ̷ ̷ ̷ˈsȯrəs noun
Etymology: New Latin, from plesi- + -saurus
1. capitalized : a genus of marine reptiles (suborder Plesiosauria) of the Mesozoic of Europe and No. America having a very long neck, a small head, and all four limbs developed as paddles for swimming
2. plural plesiosau·ri -ȯˌrī : any reptile of the genus Plesiosaurus