Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Scōti (Scotti), ōrum, m., the Scots, a people in the northern part of Britain, in the mod. Scotland, Amm. 27, 8, 5; 26, 4, 5; Hier. in Jovin. 2, 7.
In sing.: Scotus, collect., Claud. B. Get. 417; id. IV. Cons. Hon. 33; id. Laud. Stil. 2, 251.
Hence,
† scŏtĭa, ae, f., = σκοτία, in architect.