In Egyptian mythology, Chem (also Khem, Ham) was a god of fertility and the patron deity of the Egyptian civilization. In art, he was usually portrayed wearing women's clothing.

There is little doubt that this Egyptian god is related to the Old Testament character, Ham, son of Noah and progenitor of Mizraim (the Hebrew term for Egypt). Ham is rumored to have engaged in homosexual acts with his unconcenting and intoxicated father Noah.

Chem is also short form for Chemistry.