adv. Clockwise, rightwise, in the direction of the apparent course of the sun
noun Motion in a clockwise direction.
Or deiseal, deisal, deisul, etc.; there appear to be many alternative spellings.
Etymology: late 1700s, from Gaelic deiseil "toward the south".
I have a cat, Dory, who is a bit brain-damaged and has always turned widdershins - around furniture, around people...if she tries to turn deasil while chasing a cat toy, for example, she's likely to fall down.