synovial fluid

American  

[si-noh-vee-uhl floo-id] / sɪˈnoʊ vi əl ˈflu ɪd /

noun

1. Physiology. a lubricating fluid resembling the white of an egg, secreted by synovial membranes of joints, bursae, and tendon sheaths; synovia.

---

synovial fluid Scientific  

/ sĭ-nō′vē-əl /

1. A clear fluid secreted by membranes in joint cavities, tendon sheaths, and bursae, and functioning as a lubricant. When a joint disorder is present, the synovial fluid that is removed and examined can contain indicators of disease, such as white blood cells or crystals.

---

Example Sentences

That’s because as people age, those joints lose the cartilage and viscous fluid, known as synovial fluid, that keeps them supple.

From Science Magazine • Apr. 25, 2024

Located in the outer synovial lining, CD55+ cells secrete synovial fluid, allowing for frictionless joint movement.

From Science Daily • Apr. 11, 2024

Instead cartilage gets help from what experts call dynamic loading—putting stress or weight on the joint, which causes nutrient-carrying synovial fluid to flow in and out.

From Scientific American • Jun. 18, 2022

The team began by studying the knee’s interior microenvironment and noting that the A.C.L. was constantly awash in synovial fluid, which lubricates the knee.

From New York Times • Aug. 28, 2013

“That is the safe way. The foreign bodies must be allowed to en-cyst and the synovial fluid will re-form. Then it will be safe to open up the knee.”

From "A Farewell To Arms" by Ernest Hemingway