Artificial intelligent assistant

flat-bottomed

ˈflat-ˈbottomed, a.
  (Stress equal or variable)
  Having a flat bottom: chiefly of a boat.

1582 N. Lichefield tr. Castenheda's Conq. E. Ind. xiii. 33 b, They haue no quiell, but are flat bottomed. 1692 Lond. Gaz. No. 2797/3 Our Mortar-pieces are..put upon flat-bottom'd Boats. 1810 C. James Milit. Dict., Flat-bottomed boats..are made to swim in shallow water, and to carry a great number of troops, artillery, ammunition, etc. 1836 Vignoles 20 May in Life (1889) 200 Agreed with Mr. Gibbs to adopt my flat-bottomed form of rails for the Croydon line.

Oxford English Dictionary

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