نزول nuzūl A (inf. from نزل) s. m. 1. Descent, alighting, sojourning. 2. A cataract (in the eye). نزول آب nuzūl-i-āb, A swelling of the testicle, which (excepting the case of a blow, or of hernia) is universally ascribed to the descent of water: the term, therefore, comprehends hy- drocele, hernia humoralis, and scirrhus.