Castor sugar

[Geoff Bannister]

--- In HPFGU-OTChatter at yahoogroups.com, "P. Alexis Nguyen" <alexisnguyen at ...> wrote:
 
> Ali:
> By the way, Carol, a cator (caster?) is akin to a salt shaker.  I
> believe the idea of calling the stuff castor sugar was an indicator of
> the sugar that can be poured out the tiny holes of the castors.  BUT I
> admit that I have no idea whether it's castor or caster, having seen
> both used.

Geoff:
My dictionary  gives both as alternative versions but, in practice, I have 
always seen it spelt as caster on commercial packaging.

To me, a castor is a little wheel to help you shift your armchair or settee 
around.