What do all those bodies of water really mean? In this episode of Vox Almanac, Phil Edwards travels through the map to define bodies of water. Bodies of water seem simple: but there are a lot of different terms for bodies of water. From well-known terms like ocean, lake, river, and tributary, to more obscure ones like tarn, kettle lake, and firth, these bodies of water shape our world. So put on your geography life jacket and go for a swim in the fantastic world of water.You'll learn about gulfs, arroyos, fjords, oceans, bays, coves, and man other definitions for bodies of water. We can help you understand them — but you have to explore them.