cisco
noun
cis·co
ˈsi-(ˌ)skō 
plural ciscoes
: any of various whitefishes (genus Coregonus) that have a large mouth with a long and often projecting lower jaw
especially
: lake herring
Examples of cisco in a Sentence
Recent Examples on the Web
Bear Lake is also home to four endemic fish species: the Bear Lake sculpin, Bear Lake whitefish, the Bonneville whitefish, and the Bonneville cisco.
—
Lydia Mansel, Travel + Leisure, 13 July 2025
By the 1940s, the blood-suckers were killing their hosts—lake trout, lake whitefish, and ciscoes—in droves.
—Jayme Moye, Outside Online, 17 Jan. 2025
Perch and ciscoes – also known as tullibees – move into shallower water, drawing big, toothy predators in close pursuit.
—Brad Dokken, Twin Cities, 7 Dec. 2024
The suction-cup mouth and teeth helps a lamprey burrow into (and feed on) the flesh of trout, sturgeon, whitefish, ciscoes, burbot, walleye, catfish, and salmon, among others.
—Joe Genzel, Outdoor Life, 27 May 2020
Cold-water species like cisco were involved in 6% of the die-offs analyzed by the researchers.
—Elizabeth Weise, USA TODAY, 9 July 2019
Wazee is stocked periodically with trout, and a cisco introduction project was started in 2013.
—Paul A. Smith, Milwaukee Journal Sentinel, 25 May 2018
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Lydia Mansel, Travel + Leisure, 13 July 2025
By the 1940s, the blood-suckers were killing their hosts—lake trout, lake whitefish, and ciscoes—in droves.
—Jayme Moye, Outside Online, 17 Jan. 2025
Perch and ciscoes – also known as tullibees – move into shallower water, drawing big, toothy predators in close pursuit.
—Brad Dokken, Twin Cities, 7 Dec. 2024
The suction-cup mouth and teeth helps a lamprey burrow into (and feed on) the flesh of trout, sturgeon, whitefish, ciscoes, burbot, walleye, catfish, and salmon, among others.
—Joe Genzel, Outdoor Life, 27 May 2020
Cold-water species like cisco were involved in 6% of the die-offs analyzed by the researchers.
—Elizabeth Weise, USA TODAY, 9 July 2019
Wazee is stocked periodically with trout, and a cisco introduction project was started in 2013.
—Paul A. Smith, Milwaukee Journal Sentinel, 25 May 2018
Cite this Entry
“Cisco.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cisco. Accessed 4 Nov. 2025.
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