| ecuación de segundo grado | quadratic equation |
| Ecuación del campo de Einstein | Einstein field equations |
| Ecuación del centro | Equation of the center |
| Ecuación del cohete de Tsiolskovski | Tsiolkovsky rocket equation |
| ecuación diferencial | differential equation |
| Ecuación diferencial algebraica | Differential algebraic equation |
| Ecuación diferencial de Bernoulli | Bernoulli differential equation |
| ecuación diferencial estocástica | stochastic differential equation |
| Ecuación diferencial exacta | Exact differential equation |
| Ecuación diofántica | Diophantine equation |
| ecuación exponencial | exponential equation |
| Ecuación funcional | Functional equation |
| Ecuación lineal | Linear equation |
| Ecuación parabólica en derivadas parciales | Parabolic partial differential equation |
| Ecuación paramétrica | Parametric equation |
| ecuador | equator |
| Ecuador celeste | Celestial equator |
| Ecuador galáctico | Galactic equator |
| Ecuador terrestre | Equator |
| ecuanimidad | aplomb |
| ecuatoguineano | Equatorial Guinean |
| ecuatorial | equatorial |
| ecuatoriana | Ecuadoran |
| ecuatorianismo | Ecuadorianism |
| ecuatoriano | Ecuadoran |
| Ecuatorianos celebran victoria sobre Polonia | Ecuador beat Poland in second Group A match |
| Ecublens | Ecublens |
| ecumenismo | ecumenism |
| ecuménico | ecumenical |
| ecuánime | equable |
| ECW Championship | ECW Championship |
| ECW December to Dismember | ECW December to Dismember |
| ECW Television Championship | ECW Television Championship |
| ECW World Championship | ECW World Championship |
| eczema | eczema |
| Eczema dishidrótico | Dyshidrosis |
| ecóloga | ecologist |
| ecólogo | ecologist |
| Ed | Ed |
| Ed de Goey | Ed de Goeij |
| Ed Gein | Ed Gein |
| Ed Greenwood | Ed Greenwood |
| Ed Harris | Ed Harris |
| Ed Speleers | Edward Speleers |
| Ed Sullivan | Ed Sullivan |
| Ed Wood | Ed Wood |
| edad | age |
| edad adulta | adulthood |
| Edad de Bronce | Bronze Age |
| Edad de Hielo | Ice age |
| edad de hierro | Iron Age |
