ˈ ̷ ̷ˌ ̷ ̷ noun
: a dark band in the yellow portion of the solar spectrum near the sodium lines caused by watery vapor in the atmosphere and therefore sometimes used in weather predictions
ˈ ̷ ̷ˌ ̷ ̷ noun
: a dark band in the yellow portion of the solar spectrum near the sodium lines caused by watery vapor in the atmosphere and therefore sometimes used in weather predictions
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012