Synovia and Synovial membrane

Synovia noun - Viscid lubricating fluid secreted by the membrane lining joints and tendon sheaths etc..

Synovial membrane and synovia are semantically related. In some cases you can use "Synovial membrane" instead a noun "Synovia".

Synovial membrane noun - A thin membrane in synovial (freely moving) joints that lines the joint capsule and secretes synovial fluid.

Synovia and synovial membrane are semantically related. Sometimes you can replace term "Synovia" with "Synovial membrane", this terms are similar.