rhinenchysis

rhi·nen·chy·sis

(rī-nen'kī-sis),
A nasal douche; washing out the nasal cavities.
[rhin- + G. enchysis, a pouring in]

rhinenchysis

(rīn″ĕng′kă-sĭs) [″ + Gr. enchein, to pour in]
A nasal douche using a medicated or nonmedicated solution.