The mirror image, or inversion of symbolizes,
like that ideogram, rotation. It stands first and foremost for a
counterclockwise rotation and is therefore related to in Group 15.
This sign appeared in the Euphrates-Tigris river valley cultures as early a around 2000 B.C., and is an Egyptian hieroglyph for, among other meanings, the number one hundred. The very similar was a sign protruding from the hats of gods depicted by hieroglyphs.
In the earliest Chinese ideography was used with the probable meaning return or homecoming. The Hopi Indians seem to have given it the same meaning. See , below in this group.
The sign was used by the Phoenicians. It is also a pattern on Bronze Age jewelry found in Scania, Sweden, dating back about 1300 B.C.
In the system of hobo signs in Britain it means this is a good house for work, i.e. a place that is worth returning to when one needs food and money.
The sign is found painted on the walls of houses i Tibet (together with , and ), and has perhaps the meaning home, the place one returns to.
It can also signify whirlpool or eddy on nautical charts.