This is a symbol of the language <a href="https://en.wikipedia.org/wiki/Blissymbols" class="extiw" title="en:Blissymbols">Blissymbols</a>, meaning "world writing".
<a href="//commons.wikimedia.org/wiki/User:Tsuruya" title="User:Tsuruya">Tsuruya</a>
<span class="int-own-work" lang="en">Own work</span>