Words and Proper Names

nitrum (Lat.)

853.
Ó Néill (Pádraig P.): Varia: V. Old Irish sléic.
In Ériu 36 (1985), pp. 185–186.
ad D. Greene, in Ériu 33 (1982), pp. 163-164. Suggests a correspondence with Lat. nitrum and that sléic meant potash, as a personal detergent, and perhaps also a coloured, friable salt used as a cosmetic.
Greene (D.) (ref.)