Turbiditas

Part of speech: noun

Definitions

1. The quality of being cloudy or opaque due to suspended particles in a liquid
2. A state in which a fluid is disturbed and made murky by sediment, dust, or other impurities
3. The condition characterized by a lack of clarity in a liquid caused by the presence of various foreign materials

Etymology: "Turbiditas" is the Latin for "muddiness" or "confusion," built from "turbidus," meaning "disturbed" or "turbid," which itself comes from "turba," a crowd or commotion. The image is of a liquid stirred up until the sediment clouds it, and the Latin word carried that sense of agitation as much as of murkiness. In Latin the noun was used in the physical sense of cloudiness, and it passed into English through the scientific and medical vocabulary that drew on Latin for precise terms, which is why it looks so formal today. The word's most surprising feature is how literally it still means what it meant in Rome. Scientists who measure turbidity in water or in blood are using the same mental picture as the original Latin speakers, a crowd of particles thrown into motion. "Turbid" in English kept the Latin sense of agitation, so the root has moved from a murky pond to a murky argument without losing its core image of things stirred up.

Synonyms: turbidity, cloudiness, murkiness, opacity

Antonyms: clarity, clearness, transparency