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romaine

American  
[roh-meyn, ruh-] / roʊˈmeɪn, rə- /

noun

  1. Also called cos, cos lettuce.  Also called romaine lettuce,.  a variety of lettuce, Lactuca sativa longifolia, having a cylindrical head of long, relatively loose leaves.


romaine British  
/ rəʊˈmeɪn /

noun

  1. the usual US and Canadian name for cos 1

"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

Etymology

Origin of romaine

1905–10; < French, feminine of romain Roman

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Head lettuce represents about 43% of domestic production, with leaf and romaine varieties making up much of the rest.

From The Wall Street Journal Jul. 24, 2026

The Taylor family is credited with helping to pioneer numerous innovations, from bagged salads to the U.S. industry’s first automated harvesters for romaine lettuce, cabbage and celery.

From The Wall Street Journal Jul. 18, 2026

Because radish greens are delicate in texture, they pair well with similar-textured greens rather than firm greens, like iceberg lettuce or romaine.

From Salon Jun. 9, 2025

A federal court case has revealed the name of the grower behind a deadly 2024 E. coli outbreak linked to romaine lettuce, Food Safety News reported Friday.

From Salon Apr. 24, 2025

Her sink was overflowing with whole romaine lettuce leaves, bathing under the running water.

From "Darius the Great Is Not Okay" by Adib Khorram

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