fascia
In anatomy, this term describes a pervasive, three-dimensional web of collagen and elastin. It is often perceived not just as a wrapper for muscles, but as a continuous system that transmits force throughout the body. Tension in one area of the fascia can manifest as pain in a distant location, making it a focal point for physical therapists and osteopaths. In architecture, the term refers to a structural finish. It serves a dual purpose: protecting the roof's structural ends from weather damage and providing a clean aesthetic edge for the attachment of gutters. It is a utilitarian element that bridges the gap between the roof's slope and the exterior wall.
Countable when referring to the specific wooden boards on a house. Uncountable when referring to the continuous biological network of connective tissue in the body.