Definition

Noun: A type of bituminous coal that is fine-grained, burns with a bright, smoky, and luminous flame, and was historically used for making coal oil and as a good-quality domestic fuel.

Usage

"Cannel coal" is a specific geological and industrial term. It is used as a countable noun (e.g., a piece of cannel coal) or an uncountable noun to refer to the material in general. It is primarily used in historical, geological, and industrial contexts.

Examples

• The museum displayed a sample of cannel coal from the local 19th-century mines.
• This deposit contains a significant seam of cannel coal, known for its bright flame.
• Early street lamps sometimes used cannel coal because of its intense light.

Advanced Usage

• Geological Formation: Cannel coal is often described as a type of sapropelic coal, derived from spores, algae, and plant resins, which gives it its distinctive properties.
• Historical Use: The term is frequently encountered in texts discussing the history of lighting and the Industrial Revolution, as it was a key material before the widespread use of petroleum.

Variants and Related Words

• Cannel (noun): A shortened, less common form of "cannel coal."
• Bituminous coal (noun): The broader category of soft coal to which cannel coal belongs.
• Boghead coal (noun): A similar type of coal, also rich in hydrocarbons, sometimes compared or contrasted with cannel coal in geological studies.

Synonyms

• Candle coal (noun): An archaic synonym referencing its bright, candle-like flame.
• Jet coal (noun): Sometimes used, though true jet is a related but denser form of lignite used for ornamentation.

Notes on Meaning

The defining characteristic of cannel coal is its combustion quality—burning with a long, bright, and luminous yellow flame—which distinguished it from other coals used for heat or steam power. Its name is derived from an old English word "cannel," meaning "candle."

Noun

1. a bituminous coal that burns with a luminous flame