| Abbreviations | Meaning |
 | HOTS | Hypercalcemia-osteolysis-T-cell Syndrome |
 | HPBC | Hyperpolarizing Bipolar Cell |
 | HPC | Hematopoietic Progenitor Cells |
 | HPC | Hippocampal Pyramidal Cell |
 | HPC | Hydroxypropylcellulose |
 | HPC-PEP | Peplomycin Emulsion In Hydroxypropylcellulosum |
 | HPCA | Human Progenitor Cell Antigen |
 | HPCHA | High Red-cell Phosphatidylcholine Hemolytic Anemia |
 | HPMC | Hydroxypropyl Methylcellulose |
 | HPMC | Human Peripheral Mononuclear Cell; Hydroxypropylmethylcellulose |
 | HPP-CFC | High Proliferative Potential Colony-forming Cell |
 | HRBC | Horse Red Blood Cell |
 | HRC | Health Reference Center; Hereditary Renal Cancer; High-resolution Chromatography; Horse Red Cell; Human Rights Committee |
 | HRE | Hepatic Reticuloendothelial [cell]; High-resolution Electrocardiography; Hormone Receptor Enzyme; Hormone Response Element |
 | HRS | Hodgkin And Reed-Sternberg Cells |
 | HSC | Hematopoietic Stem Cell |
 | HSCT | Hematopoietic Stem Cell Transplantation |
 | HTC | Hepatoma Cell; Hepatoma Tissue Culture; Home Telecare; Homozygous Typing Cell |
 | HTL | Hamster Tumor Line; Hearing Threshold Level; Histotechnologist; Human T-cell Leukemia; Human Thymic Leukemia |
 | HTLF | Human T-cell Leukemia Virus Enhancer Factor |
 | HTLV-I | Human T-cell Lymphotropic Virus Types I |
 | HTLV-III | Human T-cell Lymphotrophic Virus Type III |
 | HTLV-MA | Cell Membrane Antigen Associated With Human T-lymphotropic Virus |
 | HUC | Human Uroepithelial Cell; Hypouricemia |
 | HUSMC | Human Smooth Muscle Cell |
 | HUVEC | Human Umbilical Vein Endothelial Cells |
 | HUVEC | Human Umbilical Vein Endothelial Cell |
 | IAP | Intracellular Action Potential |
 | IBC | Immunoglobulin Bearing Cells |
 | ICA | Immunocytochemical Analysis; Independent Component Analysis; Internal Carotid Artery; Intracranial Aneurysm; Islet Cell Antibody |
 | ICAB | Islet Cell Antibody |
 | ICAM | Intercellular Adhesion Molecules |
 | ICAM | Improved Chemical Agent Monitor; Induced Endothelial Cell Adhesion Molecule; Integrated Computer-aided Manufacturing |
 | ICAM-1 | Intercellular Adhesion Molecule 1 (endothelial Cell Adhesion Molecule) |
 | ICAM-1, -2, -3 | Intracellular Adhesion Molecule 1, 2, 3 |
 | ICARUS | Islet Cell Antibody Register User Study |
 | ICBP | Intracellular Binding Protein |
 | ICC | Immunocompetent Cells |
 | ICD | I-cell Disease |
 | ICF | Intercellular Fluorescence |
 | ICF | Intracellular Fluid |
 | ICL | Idiopathic CD4 T-cell Lymphocytopenia; Implantable Contact Lens; Intracranial Lesion; Iris-clip Lens; Isocitrate Lyase |
 | ICM | Inner Cell Mass |
 | ICM | Intracellular Multiplication |
 | ICNA | Intracellular Concentration Of Sodium |
 | ICNC | Intracerebral Nuclear Cell |
 | ICP | Infectious Cell Protein |
 | ICRC | Infant Care Review Committee; International Committee Of The Red Cross; Islet Cell Resource Center |
 | ICS | Intercellular Space |
 | ICS | Intracellular Segment |