amniotic sac

noun

Definition of amniotic sac

: amnion

Recent Examples of amniotic sac from the Web

The syndrome is rare; strands of the amniotic sac separate and entangle digits, limbs, or other parts of the developing fetus.

— paulina dedaj, Fox News, "Seattle Seahawks draft one-handed linebacker in the 5th round," 28 Apr. 2018
MacKenzie and her colleagues recruited 89 women with healthy pregnancies and 70 who went into preterm labor because of an early rupture of the amniotic sac—a condition known as preterm premature rupture of membranes.

— jennifer couzin-frankel, Science | AAAS, "Could out-of-whack fetal immune systems prompt preterm labor?," 25 Apr. 2018
At the foot of his deathbed, another monolith looms over his decrepit body, and he is transformed into a fetus in an amniotic sac, hovering over the Earth with his eyes wide open.

— brian p. kelly, WSJ, "‘2001: A Space Odyssey’ at 50: A Quiet Film Still Makes a Big Bang," 6 Apr. 2018
Her algorithm is based on gestational age; maternal risk factors, such as when the amniotic sac ruptured; and the infant's clinical exam.

— marla broadfoot, Science | AAAS, "Too many antibiotics can give preemies a lifetime of ill health," 5 Apr. 2018
When Griffin was in his mother's womb with his twin brother, Seahawks cornerback Shaquil, the amniotic sac wrapped around Shaquem's wrist.

— daniel rapaport, SI.com, "How Did Shaquem Griffin Lose His Hand?," 8 Mar. 2018
And that's not to mention the baby in the portable amniotic sac, which also apparently lives inside Reedus' throat and gives a thumbs up at one point.

— kyle orland, Ars Technica, "The utterly perplexing beauty of Death Stranding’s Game Awards trailer," 8 Dec. 2017
With an amniotic sac birth being so uncommon, one in a car must be even rarer.

— jason duaine hahn, PEOPLE.com, "Pennsylvania Mom Delivers Baby Still in Its Amniotic Sac While En Route to Hospital: ‘I Knew That Would Keep Him Safe’," 31 Aug. 2017
The amniotic sac and the fluid inside it cushion and shield the baby during pregnancy, according to Time.

— Health.com, "The Photo of the Baby Born in His Amniotic Sac Is Breaking the Internet—Here's Why It Happens," 31 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'amniotic sac.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.