Tonneau
Pronunciation : Ton`neau"
Part of Speech : n.;
Definition : 1. In France, a light-wheeled vehicle with square or rounded body and rear entrance.
2. (Automobiles) Orig., the after part of the body with entrance at the rear (as in vehicle in def. 1); now, one with sides closing in the seat or seats and entered by a door usually at the side, also, the entire body of an automobile having such an after part.
3. = Tonne.
pl. Tonneaux (#). [F.]
Source : Webster's Unabridged Dictionary, 1913