pinhole

[ pin-hohl ]

/ ˈpɪnˌhoʊl /

a small hole made by or as by a pin.

a hole for a pin to go through; tiny aperture.

Origin of pinhole

First recorded in 1670–80; pin + hole

The existence of the pin-hole pupil is also a contraindication to its employment.

A System of Practical Medicine by American Authors, Vol. I |Various
A Pin-hole Camera is another extremely simple yet extraordinarily interesting contrivance (Fig. 100).

Toy-Making at Home |Morley Adams
This is best done through a filter perforated at its apex by a pin-hole.

A Practical Physiology |Albert F. Blaisdell
With the right eye look through the pin-hole, the left eye being closed.

A Practical Physiology |Albert F. Blaisdell

The pin-hole camera is simply a light-tight box with a small aperture in one side.

Physics |Willis Eugene Tower

pinhole

/ (ˈpɪnˌhəʊl) /

a small hole made with or as if with a pin

archery the exact centre of an archery target, in the middle of the gold zone