ha
interjection
variants:
or hah
Definition of ha
(Entry 1 of 3)
—used especially to express surprise, joy, or triumph
ha
abbreviation (1)Definition of ha (Entry 2 of 3)
hectare
HA
abbreviation (2)Definition of HA (Entry 3 of 3)
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.
2
hour angle
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