Sanakirja.org

Määritelmät

Substantiivi

1. (engineering) A passage or underpass where a roadway, railway, or infrastructure crosses under another.
2. (topology, knot theory) The strand or segment in a knot diagram that passes beneath another at a crossing; i.e., the under‑crossing strand in a knot projection. As distinguished from the overcrossing or over‑strand in knot projections