sac
noun
a baglike structure in an animal, plant, or fungus, as one containing fluid.
Showing results for "sac"
- a variation of Sauk.
sac
1 American
[sak]
/ sæk /
noun
-
sacs
plural
Sac
2
American
[sak, sawk]
/ sæk, sɔk /
noun
-
Sacs,
plural
-
Sac
plural
SAC
3
American
[sak]
/ sæk /
Or
S.A.C.
noun
sac
1
British
/ sæk /
noun
SAC
2
British
abbreviation
sac
Scientific
/ săk /
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of sac
First recorded in 1735–45; from Latin saccus “bag, sackcloth”; see sack 1
Explanation
A sac is a hollow space or container. While any pocket or pouch can be called a sac, the word usually refers to a small enclosed space that occurs in nature, like a spider's egg sac or a squid's ink sac. You might put your groceries in a sack, but without the “k” a sac is smaller and attached to a plant or animal. Human fetuses grow inside an amniotic sac, and seed plants produce pollen inside sacs as well. Since the mid-1700s, sac has been used to mean "biological pocket," from the Latin root word saccus, or "bag." If you’re not sure which sac to use, it’s almost always the other one unless you’re in biology class.
Vocabulary lists containing sac
Commonly Confused Words, List 4
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Unit 2: Evolution
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The Benefits of Being an Octopus
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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:
"It came right to the grass, right up above the curbs and flooded the whole cul de sac really."
From BBC ● Aug. 27, 2026
The larvae can alter the pH of the sac walls, causing the resilin to expand or contract.
From Science Daily ● Jul. 27, 2026
In a dark room, a doctor pointed to an hourglass shape glowing on the ultrasound screen: There was her amniotic sac, funneling into her dilated cervix, and there was their tiny daughter’s foot, dipping out.
From Salon ● May 27, 2026
Meanwhile, the cul de sac, a street design much in favor with the architects of suburban developments, have become artificial catchments for these highly flammable weeds.
From The Wall Street Journal ● Nov. 17, 2025
Billy shucked off the sac and found his knife and cut the string.
From "The Red Pony" by John Steinbeck
Now, Sac City sports 70 blooming creations, including entries from the Red Hats women’s group, the sheriff’s office—and the police.
From The Wall Street Journal ● Nov. 26, 2025
"We've got to flush this one down the toilet and get ready for Sac," said Kerr, whose side face the Sacramento Kings in their next match.
From BBC ● Jan. 21, 2025
“Trump stood up for the people,” said Brett Potthoff, 30, an engineer from Sac City, Iowa, who considered caucusing for Mr. DeSantis but ultimately said he would support Mr. Trump.
From New York Times ● Jan. 21, 2024
It’s a hour flight to each place, less if it’s Sac, a little bit more if it’s to the Bay.
From Los Angeles Times ● Apr. 29, 2023
“Omaha, Nebraska. Sac City, Iowa. Alexandria, Indiana. Darwin, Minnesota. Hollywood, California. Alliance, Nebraska. Okay. Those are the locations of all the things she—well, or whoever read this book—found interesting.”
From "Paper Towns" by John Green
Defra says it may not be necessary to make this area of maerl beds an SAC, "nor is there a requirement, to protect all examples of a species or habitats."
From BBC ● Jul. 31, 2026
Mateo was rejected three times by Mount SAC before winning admission.
From Los Angeles Times ● Oct. 6, 2025
“Once I was in Mount SAC, it was a no-brainer to go to a community college,” he said.
From Los Angeles Times ● Oct. 6, 2025
The situation has already led to limits being placed on housebuilding along SAC rivers.
From BBC ● Jun. 24, 2025
At the Air Force’s Strategic Air Command headquarters in Omaha, Nebraska, the SAC commander marched down a concrete ramp into the earth.
From "Fallout: Spies, Superbombs, and the Ultimate Cold War Showdown" by Steve Sheinkin
The Sacs and Fox mined and smelted 60 tons of lead for Shreve.
From Time Magazine Archive
A description of heaven—by Wampasha, an Iowa Indian—was found in the diary of Reverend S. M. Irvin, a devoted missionary among the Iowas and Sacs.
From Legends of The Kaw The Folk-Lore of the Indians of the Kansas River Valley by Carrie de Voe
It is also extending down the river, among the Sacs and Foxes.
From Harper's New Monthly Magazine, Vol III, No 13, 1851 by Various
In 1852 joined the Sacs and Foxes, and participated in some of their battles on the plains.
From Descriptive Catalogue of Photographs of North American Indians by W. H. Jackson
PIT-A-LE-SHAR´-U. In a beautiful wooded region, near the Missouri River, were the villages of the Iowas and Sacs.
From Legends of The Kaw The Folk-Lore of the Indians of the Kansas River Valley by Carrie de Voe
These sacs act much like the ballast tanks of a submarine.
From Science Daily ● Jul. 27, 2026
Caitlin and Grace had been believed to be fraternal twins because they developed in different amniotic sacs, but doctors found their markers were exactly the same while assessing Grace as a potential stem cell donor.
From BBC ● Jul. 1, 2026
In another chapter, Mr. Haskell follows the path of an owlet moth into the cranefly orchid’s flower and lets us watch how sacs of pollen attach themselves to the insect’s eye.
From The Wall Street Journal ● Apr. 17, 2026
The spiders’ white egg sacs, usually laid between October and November, are often attached to leaves, tree bark and flat structures and contain 400 to 500 eggs, according to Jorowatch.
From Los Angeles Times ● Apr. 9, 2026
The poison sacs of the town began to manufacture venom, and the town swelled and puffed with the pressure of it.
From "The Pearl" by John Steinbeck
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