Scrabble?! OCTOTHORPS

Definitions of OCTOTHORPS in various dictionaries:

The symbol # is most commonly known as the number sign, hash, or pound sign. The symbol has historically been used for a wide range of purposes, including the designation of an ordinal number and as a ligatured abbreviation for pounds avoirdupois (having been derived from the now-rare ℔).Since 2007, widespread usage of the symbol to introduce metadata tags on social media platforms has led to such tags being known as "hashtags" and from that, the symbol itself is sometimes called a "hashtag".The symbol is defined in Unicode and ASCII as U+0023 # Number sign (HTML #) and # in HTML5. It is graphically similar to several other symbols, including the sharp (♯) from musical nomenclature and the equal-and-parallel symbol (⋕) from mathematics, but is distinguished by its combination of level horizontal strokes and right-tilting vertical strokes.