Illustrated Companion to the Latin Dictionary/Pectorale

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. 

PECTORA'LE (ἡμιθωράκιον, καρδιοφύλαξ, γύαλον). Strictly, the front plate of a cuirass (represented by the left-hand figure in the illustration (Pectorale/1.1)), which covered the chest and upper part of the abdomen, being fastened by straps over the shoulders, and buckles or hinges down the sides to another plate, which protected the back, and is represented by the right-hand figure in the illustration; though the word is also used for the entire cuirass. (Varro, L. L. v. 116. Plin. H. N. xxxiv. 18. Polyb. vi. 23.) The Greeks applied the term γύαλον to each of these plates, the back one as well as the front; but the Romans do not appear to have distinguished the former by any special name.

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  Pectorale/1.1