a frill
yes
It uses its frill of bone around its neck and shoulders and sharp horns
The dinosaur with three horns is called the "Triceratops". It is a large plant eater with a frill protecting it's neck. The Triceratops uses the horns for spearing plants, and as weapons to protect itself from predators.
No, Triceratops wasn't armored. Its large neck frill provided a small amount of protection for its neck, but it doesn't qualify as armor.
A triceratops main defence was it's three horns hence the name but it also had a hard bone crest that protected the neck it was believed to live in packs or herds these reptiles weight about four tons it was a walking tank
It is called the Nape
The scientific name for the floating bone in the neck is the hyoid bone. It is a U-shaped bone located in the anterior midline of the neck between the chin and the thyroid cartilage. The hyoid bone does not directly articulate with any other bones in the body, but it serves important functions in supporting the tongue and providing attachment for various muscles of the throat and neck.
Axis
The scientific term for neck is "cervical region" or "cervix".
The medical term for a neck joint is called a pivot joint. This is when one bone rotates around another bone in a circular motion.
The head bone's connected to the neck bone...
The three horns (made of bone, instead of usual ivory or keratin) on its head, the frill, and in some ways, the pelvic bone. It had a ball-and-socket joint instead of a pivot joint connecting its head to the neck vertebrae. This was the only organism in the fossil record to have this adaptation.