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phlogiston

 

Definitions from WordNet

Noun phlogiston has 1 sense
  1. phlogiston - a hypothetical substance once believed to be present in all combustible materials and to be released during burning
    --1 is a kind of
    substance, matter

Definitions from the Web

Phlogiston

Part of Speech: Noun

Sense 1: In 18th-century chemistry, phlogiston was a theoretical substance that was believed to be released during combustion, resulting in the properties of fire, heat, and light.

Sample Sentence 1: According to the phlogiston theory, objects that burned and released phlogiston became lighter because the substance had negative mass.

Sense 2: In a figurative sense, phlogiston can refer to anything that is believed to have a magical or mysterious power or essence.

Sample Sentence 2: The elixir was thought to contain mystical phlogiston capable of prolonging life.

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