| Word | Description |
| Fasting plasma glucose test | The preferred blood screening test recommended by the American Diabetes Association for the diagnosis of diabetes in children and non pregnant adults. If abnormal, the test should be repeated on at least one additional day to confirm the diagnosis of diabetes. The test should be performed after an 8 hour fast. For routine clinical practice, fasting plasma glucose is preferred over the oral glucose tolerance test for the diagnosis of diabetes because it is rapid, easier to administer, is more convenient for patients and providers and has a lower cost. |
| Fat | Along with proteins and carbohydrates, one of the three nutrients used as energy sources by the body. Also used as a source of bio-fuels |
| Fenestration | any opening in a building...including windows, skylights, and doors |
| Fiber | Dietary fibers are the indigestible portion of plant foods that move food through the digestive system, absorbing water and easing defecation. There are two types of dietary fiber; soluble and insoluble. |
| First-Hour Rating (FHR) | The amount of hot water in gallons a storage water heater can supply per hour (starting with a full tank of hot water); determined by the manufacturer using U.S. Department of Energy procedures. |
| Fluorescent | Light source that, when electrical surrent is applied, glows because of a chain of events iniitiated by the current's arc. |
| Foliage | Leaves of a plant |
| Foliar | Applied to the leaves of a plant |
| Foliar Frond | The erect leaves that are strap-shaped, hanging down from the basal fronds. |
| Fructose | A natural sugar found in many fruits and vegetables and in honey |
| Fruit | Fruits are products of flowers and usually develop as a result of a flower being pollinated. Fruits are basically seed-containers and seed-disseminators. |
| Fruit splitting | when the peel can no longer expand and it instead, splits |
| Fungus | A primitive form of plant life. There are species that cause plant disease such as powdery mildew or fusarium wilt. |
