Uranidin see pterine

urate cells (ARTHRO: Insecta) Special cells of the fat-body or in the epidermis or elsewhere that segregate the uric acid, when not excreted through the Malpighian tubules.

urceolus n. [L. dim. urceus, pitcher] A pitcher- or urn-shaped structure.

urea n. [Gr. ouron, urine] A simple organic compound, CO(NH 2 ) 2 , a major nitrogenous waste product.

ureter n. [Gr. ureter] 1. (ARTHRO: Insecta) A discharging duct of aggregate Malphigian tubules. 2. (MOLL: Gastropoda) A duct connecting the kidney with the mantle cavity.

uric acid A nitrogenous waste product, more complex and usually formed in smaller amounts than urea.

uricotelic a. [Gr. ouron, urine; telos, end] The excretion of nitrogen as uric acid.

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