American Heritage Dictionary
(1)
Century Dictionary
GNU Webster's 1913
WordNet
Elsewhere on the web
Fusion of influenza virus with the endosomal membrane of the host cell is mediated by the homotrimer-organized glycoprotein hemagglutinin (HA).— CiteULike: Everyone's library
Fibroblasts stably infected with a retroviral construct expressing hemagglutinin (HA) - tagged MEOX2 were harvested 15 days postinfection and subjected to chromatin immunoprecipitation with HA, PolII, or preimmune IgG antibodies.— PLoS ONE Alerts: New Articles
The hidden part of the influenza virus is in the neck below the peanut-shaped head of the hemagglutinin (HA) protein.— CCNews
In contrast, ligands derived from hemagglutinin (HA) and matrix protein (M1) were presented intermittently on a strain-by-strain basis.— CiteULike: Everyone's library
The team started its research two years ago with the focus on hemagglutinin, or— Flu Wiki Forum - Front Page

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 about twice a year.
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