rivulet
noun /ˈrɪvjələt/
/ˈrɪvjələt/
(formal)- a very small river; a small stream of water or other liquid
- Rivulets of sweat ran down her back.
- Rain ran in tiny rivulets down the window.
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’.