Naturally, I instantly got sidetracked. I looked at a few online bibles, most translate the word there as circle. From the Jehovah's witnesses there is The Watchtower web site's New World translation. Bible Gateway's KJV says circle although the New Advent catholic site has "globe".
Circle doesn't seem to me to be conclusive demonstration of the knowledge of the earth being spherical (although, certainly, the greeks knew about sphericality long ago). I did a google search and found a discussion on Does the Bible Teach a Spherical Earth? which finally determines (after analysis of "key Hebrew words and their translations in modern and ancient versions...") that "there is no substantive evidence and thus no warrant for this claim.
OK, digression over for the rest of the day, I hope. Well, actually, I'll read the article and then move on to real work :-). I'm not making any particular conclusion on the matter. It's not such a big deal, I was just struck by the very positive way Sardi makes the point in passing.