Liddell–Scott–Jones: κατάρρῠσις

κατάρρῠσις,εως,ἡ,

A. flowing down, of soap into the eyes, Philum. ap. Orib. 45.29.60 ; of phlegm, Mich. in PN 78.17 .

2. sinking down, Gal. 18(2).702 .