An extinct genus of shark-like fish from the Paleozoic era.
From Greek kestron (spear) + the suffix -action, referring to the tooth structure that resembles a spear or javelin.
Cestracionts were 'batoid sharks'—an ancient branch of sharks that evolved teeth specialized for crushing shellfish, and they ruled the oceans for 200 million years before disappearing!
Complete word intelligence in one call. Free tier — 50 lookups/day.