odn

Fetched 2026-10-26 (cache).

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Noun

1. {{lb|en|UK}} {{init of|en|[[w:ordnance datum|ordnance datum]] [[w:Newlyn|Newlyn]]|addl=used to judge the height above/below [[sea level]] in [[England]], from the [[MSL]] (mean sea level) in Newlyn between 1915 and 1921}}.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.