sapropel

== English == === Etymology === From German Sapropel, corresponding to sapro- + Ancient Greek πηλός (pēlós, “mud, clay”). === Pronunciation === (UK) IPA(key): /ˈsapɹə(ʊ)pɛl/ === Noun === sapropel (countable and uncountable, plural sapropels) (geology) An aquatic sludge-like sediment rich in organic matter formed in oxygen-free areas at the bottom of lakes, seas etc. ==== Derived terms ==== sapropelic === Anagrams === prolapse, propales == Romanian == === Etymology === Borrowed from French sapropel. === Noun === sapropel n (plural sapropeluri) sapropel ==== Declension ====