The story
From pharyngeal + jaw.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A secondary set of toothed bones or cartilage located deep within a fish's pharynx (or throat), behind the primary oral jaws; this second set of jaws are distinct from the main mouth jaws and are typically used to process food (like crushing, grinding, or tearing) and transport it to the esophagus, after the primary jaws have captured the prey. Full definition →
From pharyngeal + jaw.
Etymology from Wiktionary, CC BY-SA 4.0.