semibituminous coal

American  

[sem-ee-bi-too-muh-nuhs, -tyoo-, sem-ahy-, sem-ee-, sem-ahy-] / ˈsɛm i bɪˈtu mə nəs, -ˈtyu-, ˈsɛm aɪ-, ˌsɛm i-, ˌsɛm aɪ- /

noun

1. a coal intermediate between bituminous and anthracite coal in hardness, yielding the maximum heat of any ordinary steam coal.

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Etymology

Origin of semibituminous coal

First recorded in 1855–60; semi- + bituminous

Example Sentences

Semibituminous coal may be defined as coal having a fuel ratio ranging from 3 to 7.

From Project Gutenberg

Our anthracite deposits are circumscribed, but bid fair to last until the virtually untouched seams of bituminous and semibituminous coal shall be made amply accessible to every point of consumption.

From Project Gutenberg