cauldron bottom

noun

A large, round mass in a coal seam that forms part of the roof of a coal mine passage (usually being a fossilized root or stump); considered a hazard due to being prone to falling without warning.

Similar
cauldron arse
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Meanings

nouncauldron bottom (plural cauldron bottoms)

plural cauldron bottoms

  1. UKobsoleteslangbusinessA large, round mass in a coal seam that forms part of the roof of a coal mine passage (usually being a fossilized root or stump); considered a hazard due to being prone to falling without warning.

    Synonyms: cauldron arse

  2. Used other than figuratively or idiomatically: see cauldron, bottom.

Synonyms & antonyms

nounA large, round mass in a coal seam that forms part of the roof of a coal mine passage (usually being a fossilized root or stump); considered a hazard due to being prone to falling without warning.

Similar
cauldron arse
Also see
cauldron arse

Origin

From cauldron + bottom, in reference to the shape and colour as seen from the perspective of someone in the coal mine. Compare Sicilian campanaru (literally “bell tower”) in sulfur mining.

Full word history & related roots →
Cite this entry
APA

cauldron bottom. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/cauldron%20bottom

MLA

“cauldron bottom.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/cauldron%20bottom. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “cauldron bottom,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/cauldron%20bottom.

Source: cauldron bottom on Wiktionary, CC BY-SA 4.0.