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[roh-meyn, ruh-] /roʊˈmeɪn, rə-/
Also called romaine lettuce, cos, cos lettuce. a variety of lettuce, Lactuca sativa longifolia, having a cylindrical head of long, relatively loose leaves.
Origin of romaine
1905-10; < French, feminine of romain Roman Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for romaine
  • Discard the tough outer leaves and trim the tough ends of the head of romaine.
  • At peak bloom now, it has foliage that reminds me of fat little romaine lettuce leaves.
  • Varieties grown include head lettuce, leaf lettuce, and romaine.
British Dictionary definitions for romaine


the usual US and Canadian name for cos1
Word Origin
C20: from French, from romain Roman
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
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Word Origin and History for romaine

type of lettuce, 1876, from French romaine (in laitue romaine, literally "Roman lettuce"), from fem. of Old French romain "Roman," from Latin Romanus (see Roman). Perhaps so called because of the lettuce's introduction into France (by Bureau de la Rivière, chamberlain of Charles V and VI) at the time of the Avignon papacy (1309-77).

Online Etymology Dictionary, © 2010 Douglas Harper
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