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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

In announcing Gramma’s death, the zoo posted video of her munching on vegetarian meals — romaine lettuce and cactus fruit were particular favorites — and meandering around her habitat and lazily plodding through a pond.

From Los Angeles Times Nov. 24, 2025

TJ’s Green Goddess Salad includes shredded romaine lettuce, spinach, red cabbage and carrots tossed with chunks of chicken thigh meat that’s been seasoned with a blend of spices.

From Salon Aug. 22, 2025

I didn’t know of any Iranian recipes that involved baking romaine lettuce into bread, but that didn’t mean there weren’t any.

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

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