coak

[ kohk ]

/ koʊk /

(in a scarf joint) a tenon in one member fitting into a corresponding recess of the other.

a dowel through overlapping timbers to prevent one from sliding across the other.

Nearby words

First recorded in 1785–95; of uncertain origin

By the seventh operation, the central hole in the coak for the pin, on which the sheave turns, is drilled out.
The Ports, Harbours, Watering-places and Picturesque Scenery of Great Britain Vol. 2|William Finden
When the coak is used for heating the retorts, about one half of the whole is required.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
So truly are those grooves formed, that the slight tap of a hammer is sufficient to fix the coak in its place.
The Ports, Harbours, Watering-places and Picturesque Scenery of Great Britain Vol. 2|William Finden
If we estimate the coak by its comparative heating power, it represents 65 per cent.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

The coak which remains in the retorts constitutes about 60 per cent.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure