'Side' in the Bible

and slaughter it at the north side of the altar in the LORD's presence. Then Aaron's sons, the priests, are to sprinkle its blood around the altar.

The priest is to bring it to the altar to offer it up in smoke. He is to decapitate it and drain its blood on the side of the altar,

and then he is to eviscerate it and throw the viscera and the feathers to the east side of the altar, where the fatty ashes are located.

When his head becomes bare on the side corner of his face, he has a bald forehead, but he's clean.

Then the priest is to examine it after the contagion has been washed. If the contagion hasn't changed in appearance, even though the contagion hasn't spread, it's unclean. Incinerate it. It's a fungal infection, especially if the infection is on its exposed side.