This medical term appears only in Levitical purity laws, designating some kind of eruptive skin disease. Both occurrences appear alongside another skin condition (garab), suggesting these were related or commonly paired ailments. The disease was serious enough to disqualify priests from offering sacrifices and to render animals unfit as offerings. The precise medical identification is uncertain—it may have been some kind of scaly eruption, scab, or scurf. Ancient translators apparently understood it as a skin affliction but weren't more specific.