bossellum

bossellum [cf. OF boce < botium] , (?) rounded moulding (arch.) or sim. (? cf. boutellum). 1253 pro iiijxx pedibus et dim. de bosol’ Ac. Build. Hen. III 226 (cf. ib. 250: pro ‥ ix pedibus de bosseus); pro xlj buscellis, pretium buscelli iij d. Ib. 254.