Ephemeridæ (ef-ē-mer'-i-dē). (Gr. word = "lasting but a day.") The name of the May fly order.
Facets (fas'-ets). Little faces; small surfaces.
Femur (fē'-mer). (L. femur = a thigh.) The long bone of the upper leg above the knee. The third segment in the insect's leg.
Formidable (for'-mi-da-bl). (L. formidabilis = causing fear.) Hard to deal with; difficult to overcome.
Fry (frī). The young of fishes; used for any small animals.
Funnel (fun'-el). The shape of a hollow cone.
Gauzy (gaw'-zi). Very fine, thin, and transparent.
Ghosts (gōsts). The spirits or shadows of the dead.
Gills The breathing organs of any animal that lives in the water.
Gorge (gorj). To feed greedily; to stuff one's self.