1 ac. = 6,272,640 ___, 4 letters
1/64 of a checkerboard, maybe: Abbr., 4 letters
6,272,640th of an A., 4 letters
Denominator in some pressure measurements: abbr., 4 letters
Newspaper space meas., 4 letters
One of 6,272,640 in an acre: Abbr., 4 letters
Postage stamp size, briefly, 4 letters
Small fraction of an acre (abbr.), 4 letters
Tiny fraction of an acre: Abbr., 4 letters