American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
We show that small colonies forage in a disorganized manner, with a transition to organized pheromone-based foraging in larger colonies.— CiteULike: Everyone's library
While absorbing the Blueshammer ersatz and pheromone-scented metallurgy of— Dallas Observer | Complete Issue
Department of Biochemistry, College of Life Sciences and Biotechnology, Yonsei Proteome Research Center and Biomedical Proteome Research Center, Yonsei University, Seoul, Korea When Caenorhabditis elegans senses dauer pheromone (daumone), signaling inadequate growth conditions, it enters the dauer state, which is capable of long-term survival.— PLoS ONE Alerts: New Articles

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.