hectare
1
hemagglutinin
Different circulating influenza A viruses are identified by referring to two signature proteins on their surfaces. One is hemagglutinin (HA), which has at least 15 known variants, or subtypes.—
Jeffery K. Taubenberger et al.
Jeffery K. Taubenberger et al.2
hour angle
Examples of ha in a Sentence
Interjection
ha! I was right all along!
Recent Examples on the Web
Matt Robison, MSNBC Newsweek, 16 Apr. 2025
Su trabajo ha sido reconocido con premios de Florida Society of News Editors y Society for Profesional Journalists.
—Nora Gámez Torres, Miami Herald, 16 Apr. 2025
Su trabajo ha sido reconocido con premios de Florida Society of News Editors y Society for Profesional Journalists.
—Nora Gámez Torres, Miami Herald, 6 Mar. 2025
When did everything—everything—become ha ha ha?
—Lauren Michele Jackson, The New Yorker, 27 Feb. 2025
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Interjection
Perhaps the dog butted in once and the humans laughed and made a fuss of the dog and the dog thinks, 'Ah-ha!
—Matt Robison, MSNBC Newsweek, 16 Apr. 2025
Su trabajo ha sido reconocido con premios de Florida Society of News Editors y Society for Profesional Journalists.
—Nora Gámez Torres, Miami Herald, 16 Apr. 2025
Su trabajo ha sido reconocido con premios de Florida Society of News Editors y Society for Profesional Journalists.
—Nora Gámez Torres, Miami Herald, 6 Mar. 2025
When did everything—everything—become ha ha ha?
—Lauren Michele Jackson, The New Yorker, 27 Feb. 2025
See All Example Sentences for ha
Cite this Entry
“Ha.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ha. Accessed 25 Apr. 2025.
Copy CitationMedical Definition
HA
abbreviation
hemagglutinin
Seasonal strains … evade our immune systems after vaccination or previous infection by constantly changing the structure of their hemagglutinin (HA) surface protein.—Charles J. Russell, The New England Journal of Medicine
Charles J. Russell, The New England Journal of MedicineLove words? Need even more definitions?
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