(n) any of a system of modes used in Gregorian chants up until 1600; derived historically from the Greek mode, Syn. medieval mode, Gregorian mode, church mode
[阿姆河, Ā mǔ héㄚ ㄇㄨˇ ㄏㄜˊ] Amu Darya, the biggest river of Central Asia, from Pamir to Aral sea, forming the boundary between Afghanistan and Tajikistan then flowing through Turkmenistan and Uzbekistan; formerly called Oxus by Greek and Western writers, and Gihon by medieval Islami#147633