The Ancient Egyptian hieroglyph of a Spine issuing fluid is Gardiner sign listed no. F40 for the animal spine, fluid falling from each end. Another hieroglyph, Gardiner F39 shows only half of the spine,
The Spine with Fluid hieroglyph is used in Egyptian hieroglyphs as a biliteral with the language value of Aw-(Au) and consists of the Egyptian vowel uniliterals of a, the vulture, Gardiner G1-(birds),
Spine with fluid, stating: "...(pharaoh)-Lord (of) Extent of (the Land's) "Happiness"...." (uses the Heart (hieroglyph))
The use of the spine with fluid hieroglyph is for words showing "length", as opposed to 'breadth', (Egyptian usekh-(breadth, width)-for example, the Usekh collar). Some example words for 'length' are: to be long, length, to extend, extended; and for to expand, to dilate, words like: joy, gladness, pleasure, delight.[2]
Budge. An Egyptian Hieroglyphic Dictionary,E.A.Wallace Budge, (Dover Publications), c 1978, (c 1920), Dover edition, 1978. (In two volumes) (softcover, ISBN0-486-23615-3)