FWIW, this glyph is not listed in my copy of the December 1990 draft Unicode 1.0 document. In that document, the page, titled “Unicode 2 3 _ _ Hex Draft 9/30” only has glyphs for 0x2300 ...

Jonathan Chang, who is studying software at the University of British Columbia, summarizes the unidentified symbol '⍼' registered in Unicode. U + 237C ⍼ RIGHT ANGLE WITH DOWNWARDS ZIGZAG ARROW ...