What does Gregarious mean?

Gregarious (gri-gair-ee-uhs) is a term applied to dinosaurs for which there is fossilised evidence of group behaviour. Just like modern herding herbivores and flocking birds, paleontologists often take multi-individual bonebeds as evidence that dinosaurs enjoyed the company of others too. While such pile ups could also be the result of flash floods or long-spanning mud traps, evidence of same-species "head-biting" to establish a pecking order, fossilized trackways, and nesting grounds with remains of all growth stages from embryo to adult tell a different story. Gregarious is derived from the Latin "grex" (flock or herd) and "-ārius" (connected with; pertaining to).