countermark

countermark is defined in Webster's Unabridged Dictionary (1913) with 2 senses. The full text of each entry is reproduced verbatim below.

Definitions

  1. 1.(Far.) An artificial cavity made in the teeth of horses that have outgrown their natural mark, to disguise their age.
  2. 2.To apply a countenmark to; as, to countermark silverware; to countermark a horse's teeth.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

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