colloq. [f. TANK sb.1 + -ER1.] A tank-steamer.

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1899.  G. W. Melville, in Jrnl. Amer. Soc. Naval Engineers, XI. Feb., 37. The ‘tanker’ must take the water at the nearest source of supply and trust to luck for its being fit for drinking purposes.

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1905.  Daily News, 20 March, 7. A tanker stood ready in the bay to take the English residents to a place of safety.

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