| ERF | Education and Research Foundation; external rotation in flexion; Eye Research Foundation |
|---|---|
| ERFS | electrophysiological ring finger splinting |
| ERG | Electro-Retino-Gram |
| ERG | electron radiography; electroretinography, electroretinogram |
| ERHD | exposure-related hypothermic death |
| ERI | E-rosette inhibitor |
| ERIA | electroradioimmunoassay |
| ERIC | Educational Resource Information Center; Educational Resource Information Clearinghouse |
| ERISA | Employee Retirement Income Security Act |
| ERK | extracellular signal-regulated kinase |