Plumb-rule
noun
1.
a device for determining perpendicularity, consisting of a narrow board with a plumb line and bob suspended from an upper edge.
noun
1.
a plumb line attached to a narrow board, used by builders, surveyors, etc
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noun 1. See under . [kur-kyoo-lee-oh] /kɜrˈkyu liˌoʊ/ noun, plural curculios. 1. any of several weevils, especially one of the genus Conotrachelus, as C. nenuphar (plum curculio) which feeds on plums, cherries, and other fruits. /kɜːˈkjuːlɪˌəʊ/ noun (pl) -lios 1. any of various American weevils, esp Conotrachelus nenuphar (plum curculio), a pest of fruit trees