ton·neau (tə-nō, tŏnō′)
n. pl. ton·neaus
1. The rear seating compartment of an early type of automobile.
2. A tight-fitting removable cover, as for the cargo box of a pickup truck, the seating area of a convertible, or the cockpit of a boat.
[French, from Old French tonnel, cask; see TUNNEL.]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.