A bone that floats
Almost every bone in your body meets another bone at a joint. The hyoid is special. It doesn't touch any other bone at all!
Instead, it hangs in your neck, held by muscles and strong straps called ligaments. That's why people call it the floating bone.
It sits in the front of your neck, under your chin and above your voice box. It is shaped like a U, or a horseshoe, with the open end facing back.
Helping you swallow
Lots of muscles hold on to the hyoid. Some pull it up. Some pull it down.
When you swallow, muscles lift the hyoid up and forward. That lifts your voice box too, and helps send food down the right tube, toward your stomach.
Try it: put your fingers gently on the front of your neck, then swallow. Feel everything lift up and drop down? Your hyoid moves with it.
Helping you talk
Your tongue is joined to the hyoid. The hyoid gives your tongue a steady base to push from, like a shelf.
That helps your tongue make all the shapes it needs for words. Try saying la la la, then ka ka ka. Feel how much your tongue moves?
The name hyoid comes from an old Greek word for a letter shaped like a U.