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iceberg lettuce

noun
  1. a variety of lettuce having a cabbagelike head of crisp leaves.
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Origin of iceberg lettuce

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for iceberg lettuce

iceberg lettuce

noun
  1. a type of lettuce with very crisp pale leaves tightly enfolded
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012