the channel in which a river flows or formerly flowed.
noun 1. a tree, Betula nigra, of the eastern U.S., having papery, reddish-brown bark that peels away.
noun, Pathology. 1. onchocerciasis. river blindness noun 1. another name for onchocerciasis river blindness riv·er blindness (rĭv’ər) n. See onchocerciasis.
noun 1. any shallow-draft boat used on rivers.
- River bugging
noun 1. the activity or sport of rafting down fast-flowing rivers on a small inflatable single-seat craft, a river bug, that resembles an armchair