Sudarium

Webster's Dictionary

(n.) The handkerchief upon which the Savior is said to have impressed his own portrait miraculously, when wiping his face with it, as he passed to the crucifixion.

The Nuttall Encyclopedia

The handkerchief given by St. Veronica ( q. v .) to Christ as He was passing to crucifixion, and on which His face was miraculously impressed as He wiped the sweat off it.