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wussa

In India, means a twentieth, thus:

1

In Gujerat, India, ? – 19ᵗʰ century, a unit of land area = 1/20th of a bíghá.

sources

Vasá, or Wasá, corruptly, Wussa, Guz. ( ) A square measure of land, twenty of which are equal to one bíghá : in Guzerat it contains 142 2/9 square yards.

H. H. Wilson, 1855, page 543.

2

A unit of length, = 1/20th of a guz. Also called vussa.

sources

The shipbuilder in the Dock Yard gave in a memorandum to the late Captain J. J. Robinson, of the Indian Navy, this account was also confirmed by subsequent inquiry in Malabar and Canara. These authorities also assign 28 inches to the guz; but stated expressly, that this measure is divided in two different ways, in twenty parts, called Vussas, (that is literally twentieths,) as in Guzerat, and into 24 parts called Borels or Veeruls. The wussa therefore is equal to 1.3964 inches, the borel or veerul equal to 1.1636 inches.

T. B, Jervis.
The Expediency and Facility of Establishing the Metrological and Monetary Systems throughout India, on a Scientific and Permanent Basis, Grounded on an Analytical Review of the Weights, Measures and Coins of India, …
Bombay: American Mission Press, 1836.
Page 11.