Area naming convention

A lot of the TerraGear tools currently accept the option
--chunk=[we]XXX[ns]YY where chunk is a 10 x 10 degree area.  I'd like to
add the ability to specify a 1 x 1 degree area wherever that occurs, and
possibly also the ability to specify a single tile by (bucket) number, but
am unclear on our naming convention.  I had been using --tile=[we]XXX[ns]YY
for a 1 x 1 degree area, and was going to use --bucket=xxxxxxx for a single
tile, but it occurs to me that we seem to call individual scenery tiles
both tiles and buckets, so that could be confusing.  Anyone got any
suggestions what to call a 1 x 1 degree area?

Cheers - Dave