Webster's 1828 Dictionary
COUNTERMARK
n.[counter and mark. ] 1. A second or third mark put on a bale of goods belonging to several merchants, that it may not be opened, but in the presence of all the owners.
2. The mark of the goldsmiths company, to show the metal to be standard, added to that of the artificer.
3. An artificial cavity made in the teeth of horses, that have outgrown their natural mark, to disguise their age.
4. A mark added to a medal, a long time after it has been struck, by which its several changes of value may be known.
COUNTERMARK
v.t.To mark the corner teeth of a horse by an artificial cavity, to disguise his age.
Webster's 1913 Dictionary
COUNTERMARK
COUNTERMARK Coun "ter *mark ` (-mrk `), n.
1. A mark or token added to those already existing, in order to afford security or proof; as, an additional or special mark put upon a package of goods belonging to several persons, that it may not be opened except in the presence of all; a mark added to that of an artificer of gold or silver work by the Goldsmiths' Company of London, to attest the standard quality of the gold or silver; a mark added to an ancient coin or medal, to show either its change of value or that it was taken from an enemy.
2. (Far. )
Defn: An artificial cavity made in the teeth of horses that have outgrown their natural mark, to disguise their age.
COUNTERMARK
COUNTERMARK Coun `ter *mark " (koun `tr-mrk "), v. t.
Defn: To apply a countenmark to; as, to countermark silverware; to countermark a horse's teeth.
New American Oxford Dictionary
countermark
coun ter mark |ˈkountərˌmärk ˈkaʊntərmɑrk | ▶noun chiefly Brit. an additional mark placed on something already marked, typically for increased security. • a second watermark.
Oxford Dictionary
countermark
coun ¦ter |mark |ˈkaʊntəmɑːk | ▶noun an additional mark placed on something already marked, especially for increased security. • a second watermark.
The Wordsmith Dictionary