| F layer |
the highest zone of the ionosphere, between 120 and 250 miles above the earth. |
| flea |
any of an order of tiny wingless insects that move by jumping, and feed by sucking the blood of warm-blooded animals. [2 definitions] |
| flea-bitten |
having fleas or fleabites. [2 definitions] |
| flea in (one's) ear |
a broad hint or annoying reminder. |
| flea market |
a market, usu. outdoors, at which mostly secondhand goods are sold cheaply. |
| fleck |
a small patch of light or color. [3 definitions] |
| flection |
the act of bending or flexing, or the condition of being bent or flexed. [4 definitions] |
| fled |
past tense and past participle of flee. |
| fledge |
to tend (a young bird) and prepare it for flight. [4 definitions] |
| fledgling |
a young bird that has just grown flight feathers or learned to fly. [2 definitions] |
| flee |
to escape by moving rapidly away; run away. [2 definitions] |
| fleece |
the wool of a sheep or other animal, esp. the total yield of wool at one shearing. [7 definitions] |
| fleecy |
of, made of, covered with, or like fleece. |
| fleer1 |
to sneer, snicker, or laugh mockingly; mock. [2 definitions] |
| fleer2 |
one that flees. |
| fleet1 |
a group of naval ships under one command or grouped for one purpose. [3 definitions] |
| fleet2 |
swift and nimble. [5 definitions] |
| fleet admiral |
the highest rank for a U.S. naval officer, created and conferred only during World War II. |
| fleeting |
passing or disappearing quickly; transient; ephemeral. |
| Fleet Street |
the journalism establishment in London, England, so called after the street on which many newspaper offices are located. |
| Fleming |
a native of Flanders, or a descendant thereof. [2 definitions] |