tester
1 of 3noun (1)
test·er ˈte-stər 
: one that tests or is used for testing
tester
2 of 3noun (2)
tes·ter ˈtē-stər
ˈte-
: the canopy over a bed, pulpit, or altar
tester
3 of 3noun (3)
tes·ter ˈte-stər
: teston sense a
Word History
Etymology
Noun (2)
Middle English, headboard of a bed, canopy, from Anglo-French, from teste head, from Late Latin testa skull, from Latin, shell
Noun (3)
modification of Middle French testart, from teston
First Known Use
Noun (1)
1661, in the meaning defined above
Noun (2)
14th century, in the meaning defined above
Noun (3)
1546, in the meaning defined above