HPA

H4P3A1

Initialism of human-powered aircraft

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Meanings

nounHPA (plural HPAs or HPA)

plural HPAs

  1. abbreviationinitialismInitialism of human-powered aircraft
adjectiveHPA (not comparable)
  1. abbreviationinitialismnot comparableInitialism of hypothalamic-pituitary-adrenal.

    Numerous other reports have shown that stress experience alters the sleep-wake cycle […], pointing to a tight relationship between HPA axis activity and the sleep-wakefulness cycle […].

    2008, Helmut Vedder, edited by Adriana del Rey, George Chrousos, and Hugo Besedovsky, The Hypothalamus-Pituitary-Adrenal Axis (NeuroImmune Biology), volume 7, →ISBN, →ISSN, page 25
proper noun
  1. UKabbreviationhistoricalinitialismInitialism of Health Protection Agency.

Synonyms & antonyms

Also see
hectopascal

Rhymes & wordplay

Anagrams

PHAhappah
Cite this entry
APA

HPA. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/HPA

MLA

“HPA.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/HPA. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “HPA,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/HPA.

Source: HPA on Wiktionary, CC BY-SA 4.0.