BUZZER
buzzer
(noun) a signaling device that makes a buzzing sound
doorbell, bell, buzzer
(noun) a push button at an outer door that gives a ringing or buzzing signal when pushed
Source: WordNet® 3.1
Etymology
Noun
buzzer (plural buzzers)
One who, or that which, buzzes; an insect that buzzes.
A device that makes a buzzing sound.
(US slang) A police badge.
(cricket, slang) A run scored from an overthrow.
(obsolete) A gossip.
Source: Wiktionary
Buzz"er, n.
Definition: One who, or that which, buzzes; a whisperer; a talebearer.
And wants not buzzers to infect his ear With pestilent speeches of
his father's death. Shak.
Source: Webster’s Unabridged Dictionary 1913 Edition