From The Collaborative International Dictionary of English v.0.48 :
Tonne \Tonne\, n.
A tun. [Obs.] --Chaucer.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 :
Tonne \Tonne\, n. [F.]
A metric ton.
[Webster 1913 Suppl.]
From WordNet (r) 3.0 (2006) :
tonne
n 1: a unit of weight equivalent to 1000 kilograms [syn: metric
ton, MT, tonne, t]