greyline (English, noun)
expansion: greyline (uncountable)
Senses:
topics: engineering
natural-sciences
physical-sciences
technical
qualifier: strictly
glosses: A transition line, coinciding with a twilight zone (terminator), where a change in the propagation of radio waves is observed.
tags: uncountable
glosses: Synonym of twilight zone (“terminator”).
tags: broadly
uncountable
Forms:
form: grayline
tags: alternative