SCURVY (גָּרָב, H1734; ψώρα ἀγρία). In the Bible the term is used to cover almost any kind of obnoxious eruption, and it is pure speculation to limit its meaning to any single skin disease, or even to one definite symptom.
International Standard Bible Encyclopedia (1915)
The name "Gareb" is used in
Scurvy etymologically means any condition of scaliness of skin which can be scraped off, such as dandruff.