placental

adjective
pla·​cen·​tal | \ plə-ˈsen-tᵊl How to pronounce placental (audio) \

Definition of placental

 (Entry 1 of 2)

1 : of, relating to, having, or occurring by means of a placenta

placental

noun

Definition of placental (Entry 2 of 2)

: a placental mammal : eutherian

Examples of placental in a Sentence

Recent Examples on the Web: Adjective Then, in the petri dish, endothelial cells and the placental pericytes begin to assemble themselves into tiny vascular networks. Emily Matchar, Smithsonian, "Scientists 3D Print Skin That Develops Working Blood Vessels," 18 Nov. 2019 Things got worse about 4000 years ago when people introduced the dingo, a placental mammal from Asia that was a more efficient hunter than the Tasmanian tiger or devil and quickly outcompeted them. John Pickrell, Science | AAAS, "Giant reptiles once ruled Australia. Their loss sparked an ecological disaster," 11 Oct. 2019 These blastoids developed tissues including what appeared to be early placental tissue. San Diego Union-Tribune, "Artificial embryos draw closer with Salk Institute work in mice," 18 Oct. 2019 Further research needs to be done to evaluate the long-term effectiveness of treatments using placental extracts. Shalwah Evans, Essence, "Dr. Michelle Henry Talks How To Treat Underarm Hyperpigmentation, Milia And More," 16 Oct. 2019 There was her placental abruption, a rare condition where part of the placenta separates from the abdominal wall, which led to bed rest. Patia Braithwaite, SELF, "Mental Health in Black Moms Is Largely Ignored—5 Ways We Can Improve It," 30 Sep. 2019 Suthar recently submitted a new grant application to study first- and second-trimester placental tissue, and is worried about its fate under the still uncertain ethics provision. latimes.com, "Patients will pay for the crackdown on fetal tissue research, scientists fear," 10 June 2019 Suthar recently submitted a new grant application to study first- and second-trimester placental tissue, and is worried about its fate under the still uncertain ethics provision. latimes.com, "Patients will pay for the crackdown on fetal tissue research, scientists fear," 10 June 2019 Suthar recently submitted a new grant application to study first- and second-trimester placental tissue, and is worried about its fate under the still uncertain ethics provision. latimes.com, "Patients will pay for the crackdown on fetal tissue research, scientists fear," 10 June 2019 Recent Examples on the Web: Noun Origolestes is an ancestor to therian mammals, the group that includes all placentals and marsupials alive today. Jim Daley, Scientific American, "Now Hear This: New Fossils Reveal Early Ear-Bone Evolution," 5 Dec. 2019 For example, the specific type of placental cell where Zika can lurk in humans isn't thought to be present in mouse placentas. latimes.com, "Patients will pay for the crackdown on fetal tissue research, scientists fear," 10 June 2019 For example, the specific type of placental cell where Zika can lurk in humans isn’t thought to be present in mouse placentas. Washington Post, "Scientists feel chill of crackdown on fetal tissue research," 9 June 2019 Each increase of 5 micrograms per cubic meter in exposure was associated with 9% shorter cord blood telomeres and 13% shorter placental telomeres, the researchers estimated. Susan Scutti, CNN, "Exposure to air pollution before birth may shorten our lives," 16 Oct. 2017 The researchers reported that the Zika virus binds consistently to a protein in different placental cells called TIM1. Pam Belluck, New York Times, "Confronting a Lingering Question About Zika: How It Enters the Womb," 18 July 2016 There are three kinds of mammals: egg-laying monotremes such as the platypus, marsupials like kangaroos and opossums, and the majority—placental, or eutherian, mammals—including humans and about 4400 other mammal species. Elizabeth Pennisi, Science | AAAS, "Digital reconstruction of ancient chromosomes reveals surprises about mammalian evolution," 19 June 2017

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

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First Known Use of placental

Adjective

1785, in the meaning defined at sense 1

Noun

1839, in the meaning defined above

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Time Traveler for placental

Time Traveler

The first known use of placental was in 1785

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Statistics for placental

Last Updated

4 Dec 2019

Cite this Entry

“Placental.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/placental. Accessed 18 January 2020.

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More Definitions for placental

placental

adjective
pla·​cen·​tal | \ -əl How to pronounce placental (audio) \

Medical Definition of placental

 (Entry 1 of 2)

1 : of, relating to, having, involving, or produced by a placenta placental lactogen placental defects
2 : of or relating to placental mammals

placental

noun

Medical Definition of placental (Entry 2 of 2)

More from Merriam-Webster on placental

Rhyming Dictionary: Words that rhyme with placental

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