| Term | Definition |
|---|---|
| immunologic functions | Production and action of cells that fight disease or infection. Hits - 954 |
| impaired | Being classified as weakened or damaged. Hits - 940 |
| impending | Is about to happen. Hits - 1023 |
| impenetrable | Impossible to pass through or enter. Hits - 962 |
| indigenous breeds | Originating or occurring naturally in a particular place, native Hits - 980 |
| indiscriminately | In a random manner; unsystematically. Hits - 992 |
| indistinguishable | Not being able to be identified as different or distinct. Hits - 1029 |
| inexplicable | Unable to be explained or accounted for. Hits - 1066 |
| infertility | The inability to conceive children or young. Hits - 989 |
| infestation | The presence of an unusually large number of insects or animals in a place, typically causing damage or disease Hits - 1059 |
| innumerable | Too many to be counted (often used hyperbolically). Hits - 1089 |
| insolvent | Being unable to pay debts owed. Hits - 971 |
| integral part | It is necessary to the completeness of the whole: This point Hits - 1043 |
| intensification | The action of making or becoming more intense. Hits - 960 |
| interbreeding | (with reference to an animal) breed or cause to breed with another of a different race or species Hits - 1035 |