countermark

From counter- +‎ mark.

• Audio (US):

  (file)

countermark (plural countermarks)

1. A mark or token added to those already existing, as a security or proof.
2. (farriery) An artificial cavity made in the teeth of horses that have outgrown their natural mark, to disguise their age.

countermark (third-person singular simple present countermarks, present participle countermarking, simple past and past participle countermarked)

1. (transitive) To apply a countermark to.

   to countermark silverware

   to countermark a horse's teeth

• “countermark”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.