A prong on a fork is a 'tine'.
fork
A fork
tine
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
Prong is a point as the tine of a fork.Edited: each of two or more projecting pointed parts at the end of a fork. pierce or stab with a fork:pronged
A fork, either used as a culinary utensil (knife, fork and spoon), or as a gardening tool (garden fork), or as a farming tool (pitch-fork).
This is called a "tine."
Tine
They are called "tines".
A prong on a fork is called a Tine