greyline en · NOUN
Etymology
From grey + line.
Meanings
- (qualifier:strictly, uncountable) A transition line, coinciding with a twilight zone (terminator), where a change in the propagation of radio waves is observed.
- (broadly, uncountable) Synonym of twilight zone (“terminator”).
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| grayline | alternative | lexicographic |