Story behind the name of dosa

There is a funny story behind the name of the dosa.
An Indian cook was working under a British officer.
One day he failed to prepare some needed dish with rice floor and prepared a new dish accidentally.
The officer asked what is the name of this dish?
The cook thought for a while, as while preparing it gave two sss sounds, he told it is do(two) sa (ss),
like that it is said to became dosa.
Preparation of dosa batter
Preparation of plain dosa