| HRBC | horse red blood cell |
|---|---|
| HRC | hereditary renal cancer; high-resolution chromatography; horse red cell; human rights committee |
| IMViC, imvic | indole, methyl red, Voges-Proskauer, citrate [test] |
| IRBC | immature or infected red blood cell |
| IRCA | intravascular red cell aggregation |