&gt; I guessed it was an acronym<p>If it were an acronym, it would likely be capitalized as URN, similar to ASAP or GNU.<p>&gt; until I realized that &quot;urn&quot; if for an actual vessel-like object<p>A dictionary search seems like it would have helped here instead of Wikipedia.<p>&gt; Which turns out to be such a simple concept, but maybe a note could help future international readers.<p>I&#x27;m not sure how native speakers in any language could determine whether a given word would be problematic for international readers. There&#x27;s no inherent ambiguity in the word &quot;urn&quot; in this case for native speakers.<p>Do you have any ideas, or are you recommending a change for this particular article?<p>Personally, I&#x27;d recommend that the author change &quot;urn&quot; to something more common, like &quot;jar&quot; or &quot;bottle.&quot; Since the type of the container itself isn&#x27;t even germane to the discussion, &quot;box&quot; or &quot;container&quot; might be clearer still.