What is "plague mark"

Plague \Plague\, n. [L. plaga a blow, stroke, plague; akin to Gr. ?, fr. ? to strike; cf. L. plangere to strike, beat. Cf. Plaint.]

1. That which smites, wounds, or troubles; a blow; a calamity; any afflictive evil or torment; a great trail or vexation.
   --Shak.

   And men blasphemed God for the plague of hail.
   --Wyclif.

   The different plague of each calamity.
   --Shak.

2. (Med.) An acute malignant contagious fever, that often prevails in Egypt, Syria, and Turkey, and has at times visited the large cities of Europe with frightful mortality; hence, any pestilence; as, the great London plague. ``A plague upon the people fell.''
   --Tennyson.

   Cattle plague. See Rinderpest.

   Plague mark, Plague spot, a spot or mark of the plague; hence, a token of something incurable.