mylohyoid UK /ˌmʌɪ.lə(ʊ)ˈhʌɪ.ɔɪd/US /ˌmaɪ.loʊˈhaɪˌɔɪd/adjective 1noun 1forms 1 adjective1 •Relating to or in the region of the lower jaw and the hyoid apparatus, or the mylohyoid muscle. noun1 •Ellipsis of mylohyoid muscle. formsmylohyoids