A prong on a fork is a 'tine'.
fork
A fork
The prong on a fork is called a tine (plural tines). By definition, a tine is: 1. prong: a thin pointed projection of a utensil or implement such as a fork or pitchfork2. antler's branch: a pointed branch of a deer's antler
fork
This is called a "tine."
They are called "tines".
Tine
A prong on a fork is called a Tine
A projecting point or prong of a fork is called a tine.
They are called TINES
The word "prong" can be used as either a noun or a verb. As a noun, it is used to describe the projecting points at the end of a fork. As a verb, it means to stab or pierce with a fork.