coal gap
The time period with few coal deposits from the Permian to middle JurassicThe time period with few coal deposits from the Permian to middle Jurassic.
Meaning
1 senses(uncountable)The time period with few coal deposits from the Permian to middle Jurassic.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable