placental

1 of 2

adjective

pla·​cen·​tal plə-ˈsen-tᵊl 

1

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

2

: eutherian

placental

2 of 2

noun

: a placental mammal : eutherian

Examples of placental in a Sentence

Recent Examples on the Web

Adjective

But humans have placental barriers that protect them for the first six months of life. — Maggie O'Neill, Verywell Health, 2 Mar. 2026

In contrast, in a tree focused on marsupials, one or two placental mammals could be included at the bottom of the page for comparison. — Kevin Omland, The Conversation, 9 Feb. 2026

Noun

In contrast, in a tree focused on marsupials, one or two placental mammals could be included at the bottom of the page for comparison. — Kevin Omland, The Conversation, 9 Feb. 2026

At first, doctors suspected the tumors might be linked to her difficult delivery, possibly a result of the placental rupture or even an infection. — Jordan Greene, People.com, 25 June 2025

Word History

First Known Use

Adjective

1785, in the meaning defined at sense 1

Noun

1839, in the meaning defined above

Rhymes for placental

• judgmental
• omental
• parental
• segmental
• tegmental
• accidental
• compartmental
• continental
• detrimental
• elemental
• fundamental
• governmental

Medical Definition

placental

1 of 2 adjective

pla·​cen·​tal -əl 

1

: of, relating to, having, involving, or produced by a placenta

placental lactogen

placental defects

2

: of or relating to placental mammals

placental

2 of 2 noun

: placental mammal