nepheloid
/ˈnɛfəlɔɪd/adjective
Oceanography and Limnology. Of sea or lake water: turbid. Chiefly in nepheloid layer noun a layer of water, typically near the bottom, containing suspended mineral particles and organic matter.
Origin
Mid 19th century (in an earlier sense). From post-classical Latin nepheloides from ancient Greek νεϕελοειδής cloudy (of urine) from νεϕέλη cloud + -οειδής.