American Heritage Dictionary
(2)
Century Dictionary
(2)
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
While most moths fly at night, there are several daytime and crepuscular (dawn and dusk) species in the area.— Museum Blogs
Woodcocks are crepuscular, Shull said, using a term that means they grow active in early morning and twilight.— Sports news from standardspeaker.com
The researchers also suggest that visual behavioural displays during certain conditions of ambient light, such as the crepuscular light of dawn and dusk, could also serve as additional cues for social communication by nocturnal species.— EurekAlert! - Breaking News

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.
Recently looked upmesmerize · undock · excitatory · concern · Roseate |
Recent Favoritespygopagus · sanglant · Astacus · sweetbread · qualms |
Recent Pronunciationscimbalom · sacagawea · cumulative · spelunking · egregious |