Lignite (noun)

A type of coal intermediate in rank between peat and bituminous coal, characterized by a high moisture content and a low heating value.

Origin:

Early 19th century: from german lignit, from latin lignum 'wood'. the original sense was 'a soft brown coal of high moisture content', later changing to the current sense 'a type of coal intermediate in rank between peat and bituminous coal'.

Examples:

1. Lignite is one of the most abundant forms of coal, and is primarily used as a fuel for electricity generation.
2. The extraction and burning of lignite is a major contributor to greenhouse gas emissions and air pollution.
3. Lignite deposits are found in many parts of the world, including Europe, Australia, and the United States.
4. The use of lignite as a fuel has come under criticism due to its high carbon content and negative impacts on the environment.
5. The quality of lignite varies greatly depending on its origin and the conditions under which it was formed, with some deposits having a higher energy content and lower ash content than others.