amomam

1

In Sri Lanka, a unit of dry capacity, about 203.4 liters (5.8 U.S. bushels). Also romanized as amunam, anoman and ammomam.

2

In Sri Lanka, a unit of land area, = 4 peylas, about 11,065.63 square meters. But, in reality a seed measure of land.

sources

...1 ammonam (2 acres, 2 square roods, and 37½ square perches). But although the average extent of one ammonam is found to be 2 acres, 2 roods and 2 perches, the measurement of land is not calculated for the specific area, but from the quantity of seed required to be sown on it, and consequently according to its fertility.

Robert Montgomery Martin.
History of the Colonies of the British Empire in the West Indies, South America, North America, Asia...
London: W. H. Allen & Co. and George Routledge, 1843.
Page 396.