American Heritage Dictionary
(3)
Century Dictionary
(1)
GNU Webster's 1913
(1)
WordNet
(4)
Elsewhere on the web
Isolated marbled crayfish (Procambarus spec.) displayed rhythmic locomotor activity under 12-h light: 12-h darkness (LD12: 12) and rhythmicity persisted after switching to constant darkness— ScienceBlogs Channel : Life Science
You may want to read my post for the introduction to the topic, as I explain there why studying aggression in crayfish is important and insightful, what was done to date, and what it all means, as well as the standard methodology in the field.— ScienceBlogs Channel : Life Science
Is there social entrainment in crayfish, i.e., do they entrain their rhythms to each other in constant conditions?— ScienceBlogs Channel : Life Science

American Heritage 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 several times a year.
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