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单词 lignite
释义

lignite

/ˈlɪɡnʌɪt /
noun [mass noun]
A soft brownish coal showing traces of plant structure, intermediate between bituminous coal and peat.Peats will in situ change successively to lignite, to bituminous coal, and eventually to anthracite....
  • Coal is usually classified into the sub-groups known as anthracite, bituminous, lignite, and peat.
  • The Tertiary coal of northern Thailand is classified according to coal rank as lignite to bituminous coal.

Derivatives

lignitic

/lɪɡˈnɪtɪk/ adjective ...
  • The Oligo-Miocene succession consists of interbedded clays and sandstones with subordinate lignitic horizons and several thick conglomeratic units towards the base of the Oligocene.
  • It is capped by the above mentioned sandstone unit and grades into lignitic clay below.
  • The major limitation for using lignitic and sub bituminous Pakistani coals as fuels, is their high sulphur content.

Origin

Early 19th century: coined in French from Latin lignum 'wood' + -ite1.

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更新时间:2024/12/23 8:22:04