ER

• efficiency ratio;

• epigastric region;

• ejection rate;

• electroresection;

• emergency room;

• endoplasmic reticulum;

• enhanced reactivation;

• enhancement ratio;

• entity-relationship [model];

• environmental resistance;

• enzyme reactor;

• equine rhinopneumonia;

• equivalent roentgen [unit];

• erythrocyte receptor;

• estradiol receptor;

• estrogen receptor;

• etretinate;

• evoked response;

• expiratory reserve;

• extended release;

• extended resistance;

• external resistance;

• external rotation