Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


 (sĭ-rō′sə, -zə)
n. pl. se·ro·sas or se·ro·sae (-sē, -zē)
1. A serous membrane, especially one that lines the pericardial, pleural, and peritoneal cavities, enclosing their contents.
2. A membrane that surrounds the embryo of birds, reptiles, and many insects.

[New Latin serōsa, feminine of serōsus, serous, from Latin serum, serum.]

se·ro′sal (-zəl) adj.


1. (Anatomy) another name for serous membrane
2. (Zoology) one of the thin membranes surrounding the embryo in an insect's egg
[C19: from New Latin, from serōsus relating to serum]


(sɪˈroʊ sə, -zə)

n., pl. -sas, -sae (-sē, -zē).
1. the chorion, esp. of birds and reptiles.
[1885–90; < New Latin serōsa, feminine of serōsus < Latin ser(um)]
se•ro′sal, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.serosa - a thin membrane lining the closed cavities of the body; has two layers with a space between that is filled with serous fluid
pleura - the thin serous membrane around the lungs and inner walls of the chest
tissue layer, membrane - a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
peritoneum - a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera
endocardium - the membrane that lines the cavities of the heart and forms part of the heart valves
pericardium - a serous membrane with two layers that surrounds the heart
epicardium, visceral pericardium - the innermost of the two layers of the pericardium
parietal pericardium - the tough outermost layer of the pericardium that is attached to the diaphragm and the sternum
References in periodicals archive ?
Placenta accreta, also known as abnormally invasive placenta, is characterized by the excessive invasion of chorionic villi to the myometrium or even to the uterine serosa and neighboring organs.
The second one known as subserosal fibroid form on the outside of the uterus, also called the serosa.
Tunica serosa consisted of connective tissue, nerves, blood vessels and mesothelium (Rocha and Lima, 1998).
The wall of the small intestine, from in to out, consists of layers: the mucosa, muscularis, and serosa.
Within the air sac walls and in the coelomic serosa, multifocal granulomas 1-2 mm in diameter were present (Fig 1).
El examen histologico revelo endometriosis que involucraba la serosa y la muscular propia del ciego; media 3 x 2 cm de diametro y habia reaccion inflamatoria adyacente, que generaba obstruccion critica de la luz intestinal (figuras 4a y b).
Por ultimo, la serosa es una mono-capa muy delgada de tejido simple plano.
A necropsied steer showed subcutaneous edema around the penis and edema in the serosa of the bladder near the middle ligament.
The second suture line should include the bladder serosa and the bladder muscularis.
1] Due to the rupture of the serosa, infiltration and adhesion to the surrounding tissues occur.
This lack of serosa permits esophageal pathology to spread more easily superiorly into the neck, laterally into the mediastinum or inferiorly into the upper abdomen.
After the removal of gestational material, persistent bleeding from the rough surface of rectal serosa was observed.