Sisäura

Sisäura is a Finnish term referring to an interior groove, channel, or recess located inside a component or object. The word is formed from sisä (“inside”) and ura (“groove,” “furrow,” or “track”) and is mainly used in technical and engineering contexts to describe features that run on or within an interior surface.

In mechanical design and manufacturing, sisäura denotes a groove inside a bore, housing, or shaft where seals, rings, or other parts are seated or guided. The exact dimensions, such as width, depth, and tolerances, are specified in technical drawings or specifications and are important for proper mating of parts and for ensuring correct clearance and retention.

The term also appears in plumbing, electrical, and piping contexts to describe internal channels or recesses that accommodate cables, hoses, or fluid pathways within a housing or component. In woodworking or joinery, sisäura can refer to an internal groove cut into a workpiece to accept a panel, edge, or decorative 요소, though this usage is less common than in metalwork or engineering.

In biology or anatomy, sisäura is less standardized and is not a common formal term; when used, it typically refers to an internal groove or sulcus in a generic sense rather than a specific anatomical label.

Overall, sisäura is a specialized, mostly technical term that highlights an inwardly located groove or channel, serving functional roles such as seating, guiding, or housing other components. See also: ura, groove, internal channel.