• Webster's Revised Unabridged Dictionary
    • n Plesiosaurian (Paleon) A plesiosaur.
    • ***
Century Dictionary and Cyclopedia
    • plesiosaurian Of or pertaining to the Plesiosauria; plesiosauroid; sauropterygian.
    • n plesiosaurian A member of the Plesiosauria; a plesiosaur.
    • ***


In literature:

A genus of Plesiosaurian Reptiles.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
He would as soon have thought of passing by one of Harris's plesiosaurians ninety feet long.
"Chapters from My Autobiography" by Mark Twain
A large proportion of the other bones are evidently Plesiosaurian.
"The Cruise of the Betsey" by Hugh Miller