re·di·al 
(rēdī′əl, -dīl′)
(rēdī′əl, -dīl′)v. re·di·aled, re·di·al·ing, re·di·als or re·di·alled or re·di·al·ling
v.tr.
To place a telephone call to (a telephone number or a person) by dialing the number again, typically by pressing a designated button.
v.intr.
To redial a telephone number.
n.
A function on a telephone that allows one to place a call to the most recently dialed number by pressing a designated button.