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
Synonyms
Examples of ha in a Sentence
Interjection
ha! I was right all along!
Recent Examples on the Web
Mark Holgate, Vogue, 25 Oct. 2024
Se ha transformado en una medida de mi progreso y de mi potencial para subir al podio olímpico».
—Por Michael Gervais, Harvard Business Review, 13 Aug. 2024
Drop The Niacinamide 15 Serum into your cart and then dispense a few drops (ha) onto your face every day and night to reap the benefits.
—Sarah Han, Allure, 21 Sep. 2024
Read in English Post Buy Copies Lo ha estado esperando, esperando, soñando con ello y, por fin, está aquí: el trabajo es suyo.
—Por Rebecca Knight, Harvard Business Review, 3 Sep. 2024
See all Example Sentences for ha 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Interjection
The collection's insurance policy calls for it, ha!
—Mark Holgate, Vogue, 25 Oct. 2024
Se ha transformado en una medida de mi progreso y de mi potencial para subir al podio olímpico».
—Por Michael Gervais, Harvard Business Review, 13 Aug. 2024
Drop The Niacinamide 15 Serum into your cart and then dispense a few drops (ha) onto your face every day and night to reap the benefits.
—Sarah Han, Allure, 21 Sep. 2024
Read in English Post Buy Copies Lo ha estado esperando, esperando, soñando con ello y, por fin, está aquí: el trabajo es suyo.
—Por Rebecca Knight, Harvard Business Review, 3 Sep. 2024
See all Example Sentences for ha
Dictionary Entries Near ha
Cite this Entry
“Ha.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ha. Accessed 28 Nov. 2024.
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?
Merriam-Webster unabridged
Share