- a variety of lettuce with a long slender head and crisp leavesUsual US and Canadian name: romaine
WordReference Random House Learner's Dictionary of American English © 2026
cos /kɑs, kɔs/USA pronunciation
n.
cos, an abbreviation of:
cos., an abbreviation of:
WordReference Random House Unabridged Dictionary of American English © 2026- Food romaine.
cos, an abbreviation of:
- Mathematicscosine.
cos., an abbreviation of:
- companies.
- counties.
cos1
(kos, kôs),USA pronunciation n.
cos2 ,
Cos (kos, kôs),USA pronunciation n.
cos.,
- Plant Biologyromaine.
- after Kos, where it originated 1690–1700
cos2 ,
- Mathematics[Trigonom., Math.]cosine.
Cos (kos, kôs),USA pronunciation n.
- Place NamesKos.
cos.,
- companies.
- Governmentconsul.
- Governmentconsulship.
- counties.
- Businesscash on shipment.
Collins Concise English Dictionary © HarperCollins Publishers::
cos, cos lettuce /kɒs/ n
cos /kɒz/ abbreviation for
- cosine
Collins Concise English Dictionary © HarperCollins Publishers::
Cos /kɒs/ n
- a variant spelling of Kos
Collins Concise English Dictionary © HarperCollins Publishers::
Kos, Cos /kɒs/ n
- an island in the SE Aegean Sea, in the Greek Dodecanese Islands: separated from SW Turkey by the Kos Channel; settled in ancient times by Dorians and became famous for literature and medicine. Pop: 30 947 (2001). Area: 282 sq km (109 sq miles)
'cos' also found in these entries (note: many are not synonyms or translations):
bronco
- calico
- cisco
- coco
- cosh
- disco
- fiasco
- flamenco
- fresco
- guanaco
- junco
- Kos
- loco
- medico
- Morisco
- politico
- portico
- reduction formula
- romaine
- stucco
- taco
- tobacco
- touraco
- turaco
- academic costume
- anteportico
- arc cos
- arc cosine
- banco
- barbasco
- black cosmos
- bunco
- Caicos Islands
- calamanco
- calimanco
- catenary
- charco
- chico
- churrasco
- Cocos Islands
- Cocos Plate
- cosine
- cos lettuce
- cosmetize
- cosmetology
- cosmic
- cosmic background radiation
- cosmic dust
- cosmic noise
- cosmic ray