Illustrated Companion to the Latin Dictionary/Pseudothyrum

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. 

PSEUDOTH'YRUM (ψευδόθυρον). A false or rather secret door, for the purpose of giving ingress and egress to the premises, without being subjected to observation. Ammian. xiv. 1. Compare Cic. Sen. 6. Id. Verr. ii. 2. 20.