an electronic device used to dial telephone numbers automatically
dialer in American English
(ˈdaiələr, ˈdailər)
noun
1.
a person or thing that dials
2.
an electronic device attached to a telephone to call preselected numbers automatically when activated
Alsoesp Britdialler
Word origin
[1740–50; dial+ er1]This word is first recorded in the period 1740–50. Other words that entered Englishat around the same time include: caricature, etiquette, kingfish, outrigger, professional