Definition of "dilithium" [dilithium]

• A fictional crystalline mineral in the Star Trek franchise, described as an essential component of anti-matter energy generation systems. (noun)
• The diatomic molecule Li2 found in the gas phase. (noun)
• Two lithium atoms in a molecule. (noun)

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• "According to the reports submitted by the Enterprise, the breakdown in the crystalline structure of their dilithium was a cumulative effect."
• "“Not far from the tunnel extending down from the mines is a deposit of an extremely valuable mineral called dilithium.”"
• "He only includes words used in more than one science fiction universe so words like "dilithium", which is used only in Star Trek, are not included."