nautical twilight
The period in which the sun is 6°–12° below the horizon in the morning and eveningThe period in which the sun is 6°–12° below the horizon in the morning and evening.
Meaning
1 senses(uncountable)The period in which the sun is 6°–12° below the horizon in the morning and evening.
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable