undercross

== English == === Etymology === From under- +‎ cross. === Pronunciation === (Received Pronunciation) IPA(key): /ˈʌndərˌkrɒs/ (General American) IPA(key): /ˈʌndərˌkrɔs/ === Noun === undercross (plural undercrosses) (engineering) A passage or underpass where a roadway, railway, or infrastructure crosses under another. (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 ==== Synonyms ==== undercrossing underpass ==== Antonyms ==== overcrossing ==== Translations ====