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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. |
| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
hydronephrosis hy·dro·ne·phro·sis (hī'drō-nə-frō'sĭs)
n.
The dilation of the pelvis and calices of one or both kidneys because of the accumulation of urine resulting from obstruction to urine outflow. Also called uronephrosis.