There are multiple definitions:

1. Hodgkin-Huxley(English)

   • common model to describe electrical membrane potential
   • HDHH
   • Physiology, Biophysics

2. hedgehog(English)

   • a molecular signaling pathway which may be disturbed in certain neoplasms
   • PTCH1, SHH

3. half-hairpin(English)

   • ReAsH, sh, shEV

4. hereditary hemochromatosis(English)

   • Congenital disorders, Hematology

5. Hamburger and Hamilton [stage](English)

   • describe 46 stages of embryo development from the onset of incubation to hatch
   • Embryology /reproduction
   • https://doi.org….3382/ps/pew474

6. hand hygiene(English)

   • CCiCS
   • Preventive medicine, Hygiene
   • https://doi.org…jid.2012.05.013

7. hypogonadotrophic hypogonadism(English)

   • should be included in the differential diagnosis for any patient with absent or incomplete pubertal development. In males, this can include microphallus, cryptorchidism, absence of facial hair, and small testes; and in women, this can include incomplete or absent breast development, amenorrhea, or a eunuchoid body habitus
   • AMH, KS, HPG, GnRH
   • Genitals, Pituitary (gland), Hormone, Menstruation
   • https://doi.org…47912-7.00020-2
   • https://doi.org….1159/000098156

8. hemochromatosis(English)

   • a group of genetic diseases in which hepcidin production is impaired leading to dysregulated (and increased) intestinal iron absorption and iron release from stores, eventually resulting in tissue iron overload and associated damage
   • Genetics, Gastroenterology
   • https://doi.org…09954-4.00060-8

9. humeral head(English)

   • CA, RSA
   • Anatomy, Shoulder and other joints
   • https://doi.org…int.2020.09.011

10. Hunt and Hess (score)(English)

    • describes the clinical severity of subarachnoid hemorrhage resulting from the rupture of an intracerebral aneurysm and is used as a predictor of survival. Correlates closely with mortality rate
    • ACA, BA, BP, CBF, CCT, CVS, DIND, DSA, GCS, HES, ICA, ICP, MAP, MCA, mRS, mNIHSS, MTG, NO, SAH, STG, TCD, VA
    • Neuropathy, Surgery, Vascular disease
    • https://doi.org…/s-0043-1764118
    • https://doi.org…014.12.JNS13846