What is "sepulka"

Sepulki or sepulcas (singular: sepulka, sepulca) are fictional objects found in works of Polish science fiction writer Stanisław Lem, The Star Diaries and Observation on the Spot. They are defined in the (fictional) dictionary as "objects used for sepuling".

They are translated as Scrupts in English editions of Lem's novels, which obscures further cultural associations for English readers.