keypad

[kee-pad]
noun
1.
a separate section on some computer keyboards, grouping together numeric keys and those for mathematical or other special functions in an arrangement like that of a calculator.
2.
a panel similarly keyed and used in conjunction with a television set, electronic banking machine, or other electronic device.
Also called numeric keypad.


Origin:
1965–70; key1 + pad1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
keypad (ˈkiːˌpæd)
 
n
1.  a small keyboard with push buttons, as on a pocket calculator, remote control unit for a television, etc
2.  computing a data input device consisting of a limited number of keys, each with nominated functions

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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FOLDOC
Computing Dictionary

keypad definition

hardware
An input device with a small array of push buttons labeled with numbers or other symbols, designed to allow rapid entry of characters from a small set, e.g. decimal digits 0-9 or, historically, hexadecimal digits.
The most common form of keypad is the numeric keypad found on a standard PC keyboard.
(2008-10-10)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
They then have to press a keypad to indicate when a dot has appeared on the
  screen.
And since the keypad is flat, there are no tactile hints as to where the keys
  are located.
Ruby bearings under each keypad ensure precise key press.
It doesn't take incoming calls, and there's no keypad or display.
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