Brown coal, also known as lignite, is a type of coal that is formed from peat, a soft and brownish-black material that is composed of partially decayed plant matter. It is widely used as a fuel for power generation and heating purposes due to its low cost and abundance. In this article, we will explore the definition, meaning, origin, and associations of brown coal.
Definitions
Brown coal is a type of coal that is soft, brownish-black in color, and has a low calorific value. It is formed from peat, a type of sedimentary rock that is composed of partially decayed plant matter. Brown coal has a high moisture content and is often found in thick layers close to the surface of the earth.
Origin
Brown coal is formed from peat, which is created when plant matter accumulates in wetlands and bogs. Over time, the plant matter is buried under sediment and undergoes a process of compaction and partial decay. This process results in the formation of peat, which can then be further compressed and transformed into brown coal.
Meaning in different dictionaries
According to the Oxford English Dictionary, brown coal is defined as “a soft, brownish-black coal of low calorific value, formed from peat and found in vast quantities in Germany, Russia, and other countries.” Merriam-Webster defines it as “a soft brownish coal having a woody texture and consisting largely of carbonized plant matter.”
Associations
Brown coal is often associated with environmental concerns due to its high carbon emissions and low energy efficiency. It is also associated with economic development, as it is a cheap and abundant source of energy in many countries. In addition, brown coal is often used in the production of briquettes, which are compressed blocks of coal that are used for heating and cooking.
Synonyms
Some synonyms of brown coal include lignite, soft coal, and brown lignite.
Antonyms
Antonyms of brown coal include anthracite, bituminous coal, and hard coal.
The same root words
The root word for brown coal is lignite, which comes from the Latin word lignum, meaning wood.
Example Sentences
- The power plant was fueled by brown coal, which was abundant in the nearby mines.
- The high moisture content of brown coal made it difficult to transport and store.
- Despite its low energy efficiency, brown coal remained a popular source of fuel due to its low cost.
- The environmental impact of brown coal mining was a major concern for local communities.