The Collaborative International Dictionary
Testern
Testern \Tes"tern\, n. A sixpence; a tester. [Obs.]
Testern
Testern \Tes"tern\, v. t.
To present with a tester. [Obs.]
--Shak.
Wiktionary
testern
n. (context obsolete English) A sixpence; a tester. vb. (context obsolete transitive English) To present with a tester.