hyoi

a. [ Gr. &unr_; fr. the letter Υ + e'i^dos form: cf. F. hyoïde. ] 1. Having the form of an arch, or of the Greek letter upsilon [ Υ ]. [ 1913 Webster ]

2. (Anat.) Of or pertaining to the bony or cartilaginous arch which supports the tongue. Sometimes applied to the tongue itself. [ 1913 Webster ]

Hyoid arch (Anat.), the arch of cartilaginous or bony segments, which connects the base of the tongue with either side of the skull. --
Hyoid bone (Anat.), the bone in the base of the tongue, the middle part of the hyoid arch. [ 1913 Webster ]