Illustrated Companion to the Latin Dictionary/Crustum

This article incorporates text from a publication now in the public domain: Rich, Anthony (1849). The illustrated companion to the Latin dictionary, and Greek lexicon. p. vi. OCLC 894670115. https://archive.org/details/illustratedcompa00rich. 

CRUS'TUM. A fragment, or broken piece of bread, cake, or pastry. Hence the English crust. Hor. Ep. i. 1. 78. Virg. Aen. vii. 114.