HPA

See also: ΗΡΑ, НРА, hPA, and Hp.A

English

Noun

HPA (plural HPAs or HPA)

1. Initialism of human-powered aircraft

Adjective

HPA (not comparable)

1. Initialism of hypothalamic-pituitary-adrenal.
   • 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:

     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 […] .

Proper noun

HPA

1. (UK, historical) Initialism of Health Protection Agency.

Anagrams

• AHP, hap, PAH, PHA, Pha, pah