What is the definition of the "Keihos Levanos" mentioned in the Pasuk?
Seforno: It refers to white spots that are less white than that of the skin of an egg. 1
What is the definition of "Bohak"?
Rashi: It resembles the white spots that appear between the red marks on the skin of a red-skinned person.
Rashi #2 (Nidah, 19a): It means white - like the lots of very white spots (a rash) that one finds on the faces of youths.