hyoid n a U-shaped bone at the base of the tongue that supports the tongue muscles a of or relating to the hyoid bone Usage(s) The soft tissues adhering to the hyoid bone are not scraped off, since they provide a good blood supply. Examination of the neck structures revealed hemorrhage into the strap muscles and fractures of the thyroid cartilage and hyoid bone. Preserved even was a hyoid bone which served to support chin and jaw muscles. Synonym(s) hyoid bone os hyoideum