HA

Pronunciation (US):

(GB):

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 Dictionary entry overview: What does HA mean? 

• HA (noun)
  The noun HA has 1 sense:

1. (astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day

  Familiarity information: HA used as a noun is very rare.

 Dictionary entry details 

• HA (noun)

Sense 1

Meaning:

(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascension for an observer at a particular location and time of day

Classified under:

Nouns denoting two and three dimensional shapes

Synonyms:

HA; hour angle

Hypernyms ("HA" is a kind of...):

angular distance (the angular separation between two objects as perceived by an observer)

Domain category:

astronomy; uranology (the branch of physics that studies celestial bodies and the universe as a whole)

 Context examples 

As a result, HA antibody levels have traditionally been used to guide vaccine strain selection and to infer how effective that vaccine might be against circulating viruses until field studies are available.

(Study finds factors that may influence influenza vaccine effectiveness, NIH)

HA sits on the surface of the influenza virus to help bind it to cells and features a head and stem region.

(Flu infection study increases understanding of natural immunity, National Institutes of Health)

The authors note that future studies should examine the role of HA stem antibodies for various strains of influenza virus.

(New study reveals a novel indicator of influenza immunity, National Institutes of Health)

The team discovered and characterized the structure of a naturally occurring human antibody that recognizes and disrupts a portion of the hemagglutinin (HA) protein that the virus uses to enter and infect cells.

(Human antibody reveals hidden vulnerability in influenza virus, National Institutes of Health)

"A nickel'd ha' ben enough," she said.

(Martin Eden, by Jack London)

Ha! snows a little I see.

(Emma, by Jane Austen)

A monovalent vaccine containing hemagglutinin (HA) of influenza A (H1N1)-like virus with potential immunomodulating activity.

(Non-Adjuvanted A(H1N1) Influenza Vaccine, NCI Thesaurus)

“Ha, ha!” cried the pardoner, shaking a jewelled forefinger.

(The White Company, by Sir Arthur Conan Doyle)

Who’d ha’ thought of seein’ you at Friar’s Oak?

(Rodney Stone, by Sir Arthur Conan Doyle)

In addition, the degradation of HA may result in a lowering of the interstitial fluid pressure (IFP), allowing better penetration of chemotherapeutic agents into the tumor bed.

(Pegylated Recombinant Human Hyaluronidase PH20, NCI Thesaurus)