| codo | elbow |
| Codo de las gigantes | Turnoff point |
| CODOG | Combined diesel or gas |
| codorniz | quail |
| codorniz común | common quail |
| Codro | Codrus |
| Cody Travers | Cody |
| codón | codon |
| coeducacional | coed |
| coeducación | coeducation |
| coeficiente | coefficient |
| Coeficiente de dilatación | Coefficient of thermal expansion |
| Coeficiente de dilatación adiabática | Heat capacity ratio |
| Coeficiente de Einstein | Einstein coefficient |
| Coeficiente de emisión | Emission coefficient |
| Coeficiente de Gini | Gini coefficient |
| Coeficiente de restitución | Coefficient of restitution |
| coeficiente de temperatura | temperature coefficient |
| Coeficientes UEFA | UEFA coefficients |
| Coelernos | Coelerni |
| Coelophysidae | Coelophysidae |
| Coelophysoidea | Coelophysoidea |
| Coeluridae | Coeluridae |
| Coeluroides | Coeluroides |
| Coelurosauria | Coelurosauria |
| Coelurus | Coelurus |
| Coendou | Prehensile-tailed porcupine |
| Coendou prehensilis | Brazilian Porcupine |
| Coeno | Coenus |
| Coenraad Jacob Temminck | Coenraad Jacob Temminck |
| coenzima | coenzyme |
| coercer | coerce |
| Coercitividad | Coercivity |
| coercitivo | compelling |
| coerción | compulsion |
| Coesita | Coesite |
| coesposa | co-wife |
| coesposo | co-husband |
| coetáneo | coeval |
| Coevolución | Co-evolution |
| coexistencia | coexistence |
| coexistente | contemporaneous |
| coexistir | coexist |
| cofa de trinquete | foretop |
| cofactor | cofactor |
| Coffea | Coffea |
| Coffea arabica | Coffea arabica |
| Coffea canephora | Coffea canephora |
| Coffee and Cigarettes | Coffee and Cigarettes |
| Coffee shop | Cannabis coffee shop |
| cofia | caul |
| coficina | coffice |
| Cofidis | Cofidis |
| cofre | chest |
| Cofre de Perote | Cofre de Perote |
| cofrecito | casket |
| Cofán | Cofán |
| COGAG | Combined gas and gas |
| cogeneración | cogeneration |
| coger | take away |
