n o, m. (Lat. castellum). Perh. orig. n., cf. n p. caissle, LU 10568 , c.¤ n-Oengussa, Metr. Dinds. ii 24.89 . caiseal, caiseall m., IGT Decl. § 53 . stone wall, rampart; stone fort : Caisil .i. cīs-ail, Corm. Y 391 . caisiol .i. ciosail .i. ail an chíosa, O'Cl. oroit do Ultan . . . dorigni in caissel, Thes. ii 289.1 . ní bíd clad ná airbi na c.¤ im thír, Comp. CC 3.13 ( LU 10568 ). 'ca chaslib . . . / torchair Cannán `ramparts', Metr. Dinds. iii 278.21 . caisil ard aelta uime (of stronghold of Priam), BB 442b22 . ní fil múr ná c.¤ eturru, Trip.² 1819 . a caisiul na hatha tar eis in tirtha, Laws v 488.13 Comm. = a caisil na hatha `out of the wall of the kiln', O'Dav. 976 . da ba ar caislibh, ┐ da ba ar clocanaib ` stone-enclosures ', Laws v 94.12 Comm. tar firt a muir no a caisil, 210.27 Comm. fobairt in caisil doronadh da imsuidhi, CCath. 3513 . fían Dor ar chaislibh corra / tor na aislibh eatorra, IGT Decl. ex. 1348 . ro cuiredh misi i tech fo leith, ┐ caisil etraind, RC xlvi 230.8 . in dúnad . . . / . . . a ch.¤ bā gelchruithnecht, MacCongl. 37.10 . do rinneadar Leath Cuinn caisiol cloch tar Áth Luain, Ériu i 81 § 12 . co nderna casiul caem cloch, Fen. 124.7 . i clusailibh ┐ i caislibh na hinnsi, Lism. L. 3789 .

Of wall of or about church or ecclesiastical site: eclais chruind é-side co tri caslib immpe, ZCP xvii 228.5 . na caslisin, 6. ic dēnum caisil a chilli, ZCP vii 306.20 . gurab caemh re fēgadh / iar ndenam a c.¤ (of an altar), BNnÉ 308.28 . Transf. do bháindéad eagair n-a chaiseal tiugh (of set of teeth), Hackett² xviii 41 .

In n.loc.: ón Chasiul, LU 4453 . See Hog. Onom. s.v. caisel , caisle.

See casal.