This is a symbol of the language <a href="//commons.wikimedia.org/w/index.php?title=Blissymbols&amp;action=edit&amp;redlink=1" class="new" title="Blissymbols (page does not exist)">Blissymbols</a>, meaning "world".
<a href="https://en.wikipedia.org/wiki/Charles_K._Bliss" class="extiw" title="en:Charles K. Bliss">Charles K. Bliss</a>, 1949
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