| Abbreviations | Meaning |
 | CFUC | Colony-forming Unit Cells |
 | CFUN | Cell Function [UMLS] |
 | CGC | Cumulus-granulosa Cell |
 | CGF | Cell Generating Factor |
 | CHANG C | Chang Conjunctiva Cells |
 | CHANG L | Chang Liver Cells |
 | CHOP | Cell-surface Phosphocholine |
 | CHRBC | Chicken Red Blood Cell |
 | CI | Cell Immunity |
 | CI | Cell Inhibition |
 | CID | Cellular Immunodeficiency |
 | CIDS | Cellular Immunity Deficiency Syndrome |
 | CIE | Cellulose Ion Exchange |
 | CIK | Cytokine Induced-killer Cells |
 | CK 18 | Cytokeratin Found In Hepatocyte, Renal Tubular Cell, Ductular Epithelia, Mesothelia, And Respiratory Epithelia |
 | CL | Cell Line |
 | CLSL | Chronic Lymphosarcoma (cell) Leukemia |
 | CM | Cell Membrane |
 | CMAR | Cell Matrix Adhesion Regulator |
 | CMBC | Concentration Of Moving Blood Cells |
 | CMC | Cell-mediated Cytolysis Or Cytotoxicity |
 | CMC | Carboxymethylcellulose |
 | CMC | Critical Micelle Concentration |
 | CMC | Critical Micellar Concentration |
 | CMI | Cell-mediated Immunity |
 | CMI | Cell Multiplication Inhibition |
 | CMIR | Cell-mediated Immune Response |
 | CML | Cell-mediated Lymphocytotoxicity |
 | CML | Cell-mediated Lympholysis |
 | CMM | Cell-mediated Mutagenesis |
 | CN | Cellulose Nitrate |
 | CNBP | Cellular Nucleic Acid Binding Protein |
 | COMC | Carboxymethylcellulose |
 | COMP | Cartilage Oligomeric Matrix Protein; Cells Outside The Main Population; Complication; Cyclophosphamide, Vincristine, Methotrexate, Prednisone |
 | CP | Cell Passage |
 | CPC | Cerebellar Purkinje Cell |
 | CPK | Cell Population Kinetic [model]; Creatine Phosphokinase |
 | CPMG | Carr-Purcell-Meiboom-Gill [sequence] |
 | CPRCA | Constitutional Pure Red Cell Aplasia |
 | CR | Cellular Receptor |
 | CRABP | Cellular Retinoic Acid-binding Protein |
 | CRBC | Chicken Red Blood Cell |
 | CRBP | Cellular Retinol-binding Protein |
 | CRC | Concentrated Red Blood Cells |
 | CRFK | Crandell Feline Kidney Cells |
 | CRL | Cell Repository Line |
 | CS | Cell Surface |
 | CS | Case; Cell Surface; Cyclosporine; Static Compliance |
 | CSA | Cell Surface Antigen |
 | CSAT | Cell Substratum Attachment; Center For Substance Abuse Treatment |