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• culm
  culm

  noun

  coal dust; slack.
• Culm
  Culm

  noun

  a formation consisting mainly of shales and sandstone deposited during the Carboniferous period in parts of Europe

culm

¹ American  

[kuhlm] / kʌlm /

noun

1. coal dust; slack.

2. anthracite, especially of inferior grade.

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culm ² American  

[kuhlm] / kʌlm /

noun

1. a stem or stalk, especially the jointed and usually hollow stem of grasses.

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verb (used without object)

1. to grow or develop into a culm.

Culm ¹ British  

noun

1. a formation consisting mainly of shales and sandstone deposited during the Carboniferous period in parts of Europe

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culm ² British  

/ kʌlm /

noun

1. coal-mine waste

2. inferior anthracite

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culm ³ British  

/ kʌlm /

noun

1. the hollow jointed stem of a grass or sedge

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culm Scientific  

/ kŭlm /

1. The stem of a grass or similar plant.

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Etymology

Origin of culm¹

1300–50; Middle English colme, probably equivalent to col coal + -m suffix of uncertain meaning (compare -m in Old English fæthm fathom, wæstm growth)

Origin of culm²

1650–60; < Latin culmus stalk; akin to calamus, haulm

Example Sentences

“It could also be a culm bank where they put all the refuse of the coal industry. It does look like there are trees growing on it.”

From Seattle Times • Dec. 25, 2017

As far as DEP is concerned, reprocessing coal from culm banks is a benefit: It mitigates a hazard, as well as the environmental issues, Stefanko said.

From Washington Times • Jun. 6, 2015

The task of dredging out millions of tons of accumulated silt and culm is ready to begin.

From Time Magazine Archive

Long have there been rumors that PRC would go into the power business, using its own small grade anthracite and reclaiming culm banks for fuel.

From Time Magazine Archive

Spikes globular or short-oblong, obtuse, sessile or short-peduncled, approximate at the top of the culm; bracts short, leaf-like, sheathless; perigynium entire at the orifice, the beak none or very short and stout.—Sp.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa