looduses selgelt piiritletav lineaarne negatiivne pinnavorm, usually narrow negative linear landform that is diverse in shape and measures and can be of different origin (glacial valley - trough; river valley etc); dominating erosional processes are reflected in the shape of cross profile
region around a pit such that all maximal downward paths end at the pit, inwardly directed (from surrounding medium to material) contiguous portion of the profile below the reference line bounded by the two adjacent points where the ordinate values change their sign, piirkond oru ümber nii, et kõik maksimaalsed allapoole suunatud teed lõpevad orupunktiga
dale 3 . Metroloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mea/dale/3/eng (19.06.2026)
