| Term | Definition |
| Eugenics | Science dealing with improving the heredity quilities(genes) of the human race. |
| Eulogize | Write or speak in praise of someone. |
| Eupepsia | Good digestion. |
| Euphemism | Substitution of a "good" expression for an unpleasant one. |
| Euphonious | Pleasing in sound. |
| Euphoria | Sense of great happiness or well-being. |
| Euthanasia | The act or practice of ending the life of an individual suffering from a terminal illness or an incurable condition, as by lethal injection o rthe suspension of extraordinary medical treatment. |
| Euthenics | Science dealing with the improving living conditions. |