شن

شَانَّةٌ ذ The [ channel called ] مَدْفَع [q. v.] of a small valley: or a small مَدْفَع of a valley: (TA: [the want of a vowel-sign in my original renders it doubtful which of these meanings is the right one:]) or شَوَانُّ, its pl., signifies the channels of water, of mountains, that pour forth into valleys from a rugged place. (AA, TA.)