Union symbol (hieroglyph)

The Union symbol is Gardiner sign listed no. F36, part of the series for parts of mammals. As a "union symbol",, it contains a vertical invisible 'centerline'. It allows for the positioning of two important hieroglyphs to be attached to it, right and left, as the uniting of two halves; specifically this is referencing Upper Egypt, represented by the sedge hieroglyph M23 and Lower Egypt, represented by the papyrus clump hieroglyph M16.

For its use as "uniting of two lands", it has an identical usage to the Two whips with shen ring hieroglyph Aa6, which from its very construction appears as the uniting of two separate "tribes", or communities.