| Terms for subject Environment (23592 entries) |
| frente de llamas | flaming front | |
| frente marítimo | marine front | |
| freones | freon | |
| freón | freon (Trade name for a group of polyhalogenated hydrocarbons containing fluorine and chlorine; an example is trichlorofluoromethane) | |
| freón | freon | |
| friable | friable | |
| frigorífico | refrigerator (An appliance, a cabinet, or a room for storing food or other substances at a low temperature) | |
| fringílidos | New World seedeaters | |
| fringílidos | finches | |
| frio | cold (No definition needed) | |
| frio | cold | |
| frontera nacional | national boundary (The line demarcating recognized limits of established political units) | |
| frontera nacional | national boundary | |
| fronteras | border (The dividing line or frontier between political or geographic regions) | |
| fronteras | border | |
| fruta | fruit (A fully matured plant ovary with or without other floral or shoot parts united with it at maturity) | |
| frutales | fruit tree (Any tree that bears edible fruit) | |
| frutales | fruit tree | |
| fucsina | fuchsine | |
| fuego contra el viento | backing fire |