pelycosaur
pelycosaur Lexical Profile
pelycosaur Game Scores & Validity
• noun
Any member of an informal group of primitive, Late Paleozoic synapsids that are closely related to the ancestors of mammals, famously represented by the sail-backed Dimetrodon.
"Often mistaken for a dinosaur, the sail-backed Dimetrodon was actually a pelycosaur that roamed the Earth millions of years before the first true dinosaurs appeared."
Word Nuance & Usage
Pelycosaurs are frequently, yet incorrectly, identified as dinosaurs; they actually lived tens of millions of years earlier during the Paleozoic era and are more closely related to the ancestors of mammals.
Word Origin & Etymology
Coined in the late 19th century from the Greek words 'pelyx' (basin or bowl) and 'sauros' (lizard), referring to the basin-like shape of their pelvic girdles.
Usage Trend
Historical frequency of usage in published text.