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decidua

de·cid·u·a [ di síjjoo ə ] (plural de·cid·u·ae [ di síjjoo  ])


noun 
Definition:
 
part of uterus: a specialized part of the mucous membrane endometrium that lines the womb during pregnancy and is shed with the placenta at birth

[Late 18th century. < modern Latin decidua (membrana) "deciduous (membrane)"]

de·cid·u·al adjective
de·cid·u·ate [ di síjjoo ət ] adjective
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