[dahy-uh-ler, dahy-ler]
a person or thing that dials.
an electronic device attached to a telephone to call preselected numbers automatically when activated.
Also, especially British, dialler.

1740–50; dial + er1

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Recall patients you have not heard from by using letters and auto-dialer phone messages.
Recall patients you have not heard from by using letters or auto-dialer phone messages.
Building must be equipment with an automatic sprinkler system and automatic dialer to summon the local fire department.
After it successfully connects with a modem tone, the war dialer will record the phone number in a database.
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