crepuscule |kriˈpəsˌkyoōl|nounthe period of partial darkness at the beginning or end of the day; twilight.
I acquired this word watching a nature documentary about deer on PBS. Apparently, deer are crepuscular. I also learned that the "deer in the headlight" phenomena has nothing to do with fear. Instead, their brains get so overloaded with information, they simply can't decide what to do.
