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| an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language. |
| (used as a nonsense word by children to express approval or to represent the longest word in English.) |
nephelometer neph·e·lometer (něf'ə-lŏm'ĭ-tər)
n.
An apparatus used to measure the size and concentration of particles in a liquid by determining the amount of light scattered by the liquid.