There are multiple definitions:

1. hydroxycarbonate apatite(English)

2. hierarchic cluster analysis(English)

   • APE, COSIAM, ESI, FSR, LH, MPB, OVX, PCOS
   • Machine learning, Menstruation, Exercise & Training, Myocyte / muscle, Hormone, Metabolism
   • https://doi.org/10.1113/JP287342

3. healthcare assistant(English)

   • HCSW
   • Care giver/provider

4. Human Cell Atlas(English)

   • comprehensive reference maps of all human cells as a basis for both understanding human health and diagnosing, monitoring, and treating disease
   • Diagnostics, Organizations (international), Health care
   • https://www.humancellatlas.org/

5. hospital cardiac arrest(English)

   • IHCA, OHCA
   • Cardiology, Hospital admission
   • https://doi.org…8.CD007260.pub4

6. hepatocellular adenoma(English)

   • benign monoclonal hepatic tumor that commonly occur in females (3-4 per 100,000 women) due to the use of oral contraceptives
   • GS, HA, H-HCA, IHCA, LFABP, SAA
   • Liver disease, Gland(ular), Woman /female
   • https://doi.org….1159/000480376