You searched for: “adder
adder, adder
adder (AD uhr) (noun)
Someone or something that adds; especially, a computational device that performs arithmetic additions: The accountant used her adder to determine her total income for the year.
adder (AD uhr) (noun)
Any of several nonvenomous snakes; such as, the milk snake of North America, popularly believed to be harmful: While going for a walk, Melvin suddenly saw what he believed was an adder crawling through the grass.

An experienced adder is the person who should count the number of adder in the local park.