Origin of testerMiddle English testere from Old French testiere, headpiece, crown of a hat from teste, the head from Classical Latin testa: see test
Origin of testeraltered from Middle French testart from teston, teston + -art, -ard
Origin of testerMiddle English from Medieval Latin testrum from Late Latin testa skull from Latin shell
state bedroom of Empress Maria Feodorovna (1847-1928) at the Pavlovsk Palace
St. Petersburg, Russia
Origin of testerAlteration of teston
From test +"Ž -er.