There are multiple definitions:

1. hydroxytryptamine(English)

   • 5-HT

2. Hough transform(English)

   • ROI, RVHT
   • Transform

3. hypertension(English)

   • HBP, HTN
   • Hypertension

4. histologic technologist(English)

   • Specialist / expert, Histochemistry

5. histologic technician(English)

   • ASCP
   • Histochemistry

6. Hilbert transform(English)

   • Transform

7. heart transplantation(English)

   • also as HTX
   • HTX
   • Cardiology, Transplantation
   • https://doi.org…3/ehjcr/ytab146

8. hormonal therapy(English)

   • menopausal symptoms, such as osteoporosis, hot flashes, and urogenital atrophy, have been treated with hormone therapy, comprising estrogens alone or estrogens and progestins. In fact, because of their beneficial actions in non-reproductive tissues, such as bone, brain, and urogenital tract, estrogens would be ideal drugs if they did not have serious adverse effects, consisting mainly of increasing the risk of breast and endometrial cancer, as well as of thromboembolisms and strokes
   • ER-alpha, ER-beta
   • Hormone, Therapeutic approaches, Adverse effect, Estrogen, Menopause
   • https://doi.org…ids.2014.06.012

9. Hashimoto's thyroiditis(English)

   • the most prevalent inflammatory disorder of the thyroid gland
   • PTMC, CLNM
   • Thyroid and parathyroid
   • https://doi.org…3277-015-4534-4
   • https://doi.org…ndo.2021.772071

10. hyperthyroid(English)

    • ADP, CSQ, CSQ1, EDL, SERCA, SOL, SR, TH
    • Thyroid and parathyroid, Hormone, Myocyte / muscle
    • https://doi.org…0418-014-1247-5

11. hip torque(English)

    • increased during early stance for the prosthetic leg and decreased for the sound leg with the A-MPK compared to the P-MPK approach
    • A-MPK, P-MPK, TF
    • Skeleton and bone (formation), Bioengineering
    • https://doi.org…2938-016-0287-6

12. high tie [ligation](English)

    • low rather than high type significantly decreases the severe postoperative complication rate after IMA ligation without affecting recurrence-free or overall survival
    • CRC, IMA, LT
    • Surgery, Gastroenterology, Oncology, Quality and outcomes
    • https://doi.org…nticanres.13605

13. historical treatment(English)

    • refers to ocular and orbital manifestations of Erdheim–Chester disease
    • BRAF, ECD, INN
    • Therapeutic approaches, Ophthalmology
    • https://doi.org…30.2022.2087232

14. hypothesis testing(English)

    • refers to tracking co-occurrence across ambiguous naming situations to infer the referents of new words
    • BIC, CSWL, WOLVES
    • Paradigm or theory
    • https://doi.org…1037/rev0000313

15. hexose transporter(English)

    • facilitates entrance in the parasite plasma membrane
    • MC, PNEP, pRBC, PV, PVM, RBC, RESA, REX1
    • Malaria
    • https://doi.org…8/mBio.01460-19

16. hamstring tendon(English)

    • ACL, ACLR, BPTB, QT
    • Musculoskeletal system, Surgery
    • ttps://doi.org/…363546518825340

17. homogenizer tip(English)

    • the homogenizer light guide results in significantly increased microhardness
    • KHN, LCU, LED, MAPO, RBC, VH
    • Dentistry, Materials science
    • https://doi.org/10.2341/19-027-L

18. high turnover(English)

    • refers to clinical dietetics
    • LT, RD
    • Diet, Specialist / expert
    • https://doi.org…/cjdpr-2021-023

19. hydrolyzable tannin(English)

    • CH4, CT, DMI
    • Pollution and health, Environment, Nutrition
    • https://doi.org…1093/jas/sky352

20. hypermobility type(English)

    • refers to a perioperative opioid-minimization approach as a useful protocol
    • CCI, EDS, JHS
    • Pain, Anesthesiology/analgesia
    • https://doi.org…023-023-02829-9

21. hypothalamus(English)

    • AD, FC, HPA, L-NAME, PT
    • Brain (dys)function, Endocrinology, Neurology
    • https://doi.org…0/ijms242116007

22. hydrodynamics-based transfection(English)

    • HCC, PDZ, TAZ, YAP
    • Liver disease, Oncology
    • https://doi.org….1002/hep.32000