mə̇ˈstāsh(ē)əl adjective
also mys·ta·cal ˈmistə̇kəl ; or mys·ta·cine -təˌsīn, -_sə̇n ; or mys·ta·ci·nous |mistə|sīnəs
Etymology: Greek (Doric) mystak-, mystax moustache + English -ial or -al or -ine or -inous (from Latin -inus ) — more at moustache
: having a stripe or fringe of hairs suggestive of a moustache