pentaoxolane
The unstable allotrope of oxygen composed of a ring of five atomsThe unstable allotrope of oxygen (O₅) composed of a ring of five atoms
Meaning
1 senses(uncountable)The unstable allotrope of oxygen (O₅) composed of a ring of five atoms
Origin
From penta- + oxolane?From penta- + oxolane?
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Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable