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

Then came the worst part: I passed the amniotic sac.

From The Wall Street Journal ● May 13, 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

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

This egg sac is my great work—the finest thing I have ever made.”

From "Charlotte's Web" by E.B. White

When the researchers examined the larvae, they discovered that the insects had adapted part of their respiratory system into two pairs of small air sacs.

From Science Daily ● Jul. 27, 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

Caitlin and Grace were in different amniotic sacs in the womb, so their parents believed they were fraternal twins.

From BBC ● Feb. 24, 2026

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

From "Frightful's Mountain" by Jean Craighead George