vesilinjan

Vesilinja is a Finnish term formed from ves(i) meaning water and linja meaning line. In standard Finnish, vesilinja refers to a line related to water, and the genitive form vesilinjan is used when the water line is mentioned as belonging to or defining something. The word is technical and common mainly in nautical or civil engineering contexts.

In maritime usage, vesilinja denotes the waterline of a vessel—the horizontal line at which the hull meets the water surface under standard loading. The waterline is important for determining draft, buoyancy, stability, and regulatory load lines. Nautical texts may discuss vesilinjan korkeus (the height of the waterline) or vesilinjan asento (the position of the waterline) as part of ship design, loading procedures, and performance assessments.

In civil engineering and water infrastructure, vesilinja can refer to the main water supply line or service line within a building or network. In this sense the term appears in planning, construction, and maintenance documentation related to potable water distribution, hydrants, and metering points. It can also surface in discussions about water pressure, flow, and isolation valves.

Usage notes: vesilinja is a technical term and not part of everyday language outside specialized fields. Depending on context, more common words such as vesilinja (in uninflected form) or other terms like vesijohdin (water pipe) or veden korkeus (water level) may be used. The exact preferred form can vary by discipline and author.