Clinker in this context refers to a leftover from burning coal, not just any ash.

Coal Byproduct

Clinker must be removed for a fireplace or furnace to work effectively.

Disposal Importance

Clinker as a brick is designed to endure high temperatures in construction.

Heat-Resistant Brick

Use this term specifically when talking about clinker bricks in building materials.

Construction Use

Clinker here is a geological term for a type of sedimentary rock, not to be confused with brick or ash.

Sedimentary Context

When discussing rocks and geology, clinker refers to a particular rock formation.

Geology Specific

In music or performance, clinker is a noticeable mistake, often disrupting the flow.

Performance Mistake

Use this sense of clinker in informal settings to describe errors in music or live performances.

Colloquial Usage

Clinker is used colloquially to describe something of low quality or a failure.

Poor Quality

This slang term is more recent and indicates dissatisfaction with a product or event.

Modern Slang

 because the higher the quality of the clinker, the less of it you will need to produce cement ultimately, and therefore the less emissions you will generate. But producing high-quality clinker is a complex science. It depends on multiple factors that influence each other.

Charlotte Degot: A more...

 provided a viable alternative. The first canoes were simply hollowed out logs rowed with paddles. Over time, they added planks to the log boat base using the clinker, or "lapstrake," technique, meaning the planks overlapped

What's so special about...

 contagious disease that bees get clinker is the only certified dog in the continental United States probably