riv·u·let
noun/ˈrɪvjələt/
/ˈrɪvjələt/
(formal)- a very small river; a small stream of water or other liquid
小河；小溪；溪流；细流 - Rivulets of sweat ran down her back.
汗珠从她的背上流下来。 - Rain ran in tiny rivulets down the window.
雨水像小溪一样顺着窗户流下来。
Word Originlate 16th cent.: alteration of obsolete riveret (from French, literally ‘small river’), perhaps suggested by Italian rivoletto, diminutive of rivolo, based on Latin rivus ‘stream’. - Rivulets of sweat ran down her back.