sac

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

In these cases, the sheer size of the cell and the presence of a large yolk sac prevent the actin ring from fully closing.

From Science Daily ● Feb. 28, 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

Knee and ankle issues began in 2017, then two years later she needed treatment for pericarditis - an inflammation of the fluid-filled sac around the heart - which was potentially career-ending.

From BBC ● Jun. 4, 2025

When threatened, the Lobalug contracts its venom sac, blasting the attacker with poison.

From "Fantastic Beasts and Where to Find Them" by J.K. Rowling

These sacs act much like the ballast tanks of a submarine.

From Science Daily ● Jul. 27, 2026

The researchers next placed the larvae inside miniature pressure chambers to determine how much pressure the air sacs could withstand before collapsing.

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

Male frigate birds with bright red balloonlike sacs under their chins cruised the shore.

From "Frightful's Mountain" by Jean Craighead George