decidua

American  

[dih-sij-oo-uh] / dɪˈsɪdʒ u ə /

noun

Embryology.

plural

deciduas, deciduae

1. the endometrium of a pregnant uterus that in many of the higher mammals is cast off at parturition.

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decidua British  

/ dɪˈsɪdjʊə /

noun

1. the specialized mucous membrane that lines the uterus of some mammals during pregnancy: is shed, with the placenta, at parturition

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Other Word Forms

• decidual adjective

Etymology

Origin of decidua

1775–85; < New Latin, noun use of feminine of Latin dēciduus falling; see deciduous

Example Sentences

The research showed that the decidua, the layer of the uterine lining that forms during pregnancy, and blood vessels, are sending different signals to the placenta when a pregnant person has placenta accreta.

From Science Daily • Jan. 30, 2024

The maternal portion of the placenta develops from the deepest layer of the endometrium, the decidua basalis.

From Textbooks • Jun. 19, 2013

The outer one of these is the inner lining of the womb itself, known as the decidua vera.

From What a Young Husband Ought to Know by Stall, Sylvanus

The tubal placenta possesses foetal structures, the true decidua forming in the uterus.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" by Various

The tearing away of the decidua at birth naturally causes the mother to lose a quantity of blood, which does not happen in the Indecidua.

From The Evolution of Man — Volume 2 by Haeckel, Ernst Heinrich Philipp August