Definify.com
Webster 1913 Edition
Testoon
Tes-toon′
,Noun.
[It.
testone
. See Tester
a coin.] An Italian silver coin. The testoon of Rome is worth 1s. 3d. sterling, or about thirty cents.
Homans.
Webster 1828 Edition
Testoon
TESTOON'
,Noun.