foot race
— Navneord
– Engelsk
～ a race run on foot; "she broke the record for the half-mile run"
family Rachycentridae
— Navneord
– Engelsk
～ family of pelagic fishes containing solely the cobia
fire control radar
— Navneord
– Engelsk
～ naval radar that controls the delivery of fire on a military target
full radiator
— Navneord
– Engelsk
～ a hypothetical object capable of absorbing all the electromagnetic radiation falling on it; "a black body maintained at a constant temperature is a full radiator at that temperature because the radiation reaching and leaving it must be in equilibrium"
free radical
— Navneord
– Engelsk
～ an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule; "in the body free radicals are high-energy particles that ricochet wildly and damage cells"
Father of Radio
— Navneord
– Engelsk
～ United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)
family Rafflesiaceae
— Navneord
– Engelsk
～ a family of parasitic plants of the order Aristolochiales
false ragweed
— Navneord
– Engelsk
～ tall annual marsh elder common in moist rich soil in central North America that can cause contact dermatitis; produces much pollen that is a major cause of hay fever
fence rail
— Navneord
– Engelsk
～ a rail that is split from a log
fife rail
— Navneord
– Engelsk
～ the railing surrounding the mast of a sailing vessel
funicular railway
— Navneord
– Engelsk
～ a railway up the side of a mountain pulled by a moving cable and having counterbalancing ascending and descending cars
fund raise
— Udsagnsord
– Engelsk
～ raise money for a cause or project; "We are fundraising for AIDS research"
fund-raise
— Udsagnsord
– Engelsk
～ raise money for a cause or project; "We are fundraising for AIDS research"
fund-raising campaign
— Navneord
– Engelsk
～ a campaign to raise money for some cause
fund-raising effort
— Navneord
– Engelsk
～ a campaign to raise money for some cause
fund-raising drive
— Navneord
– Engelsk
～ a campaign to raise money for some cause
fire-raising
— Navneord
– Engelsk
～ malicious burning to destroy property; "the British term for arson is fire-raising"
family Rajidae
— Navneord
– Engelsk
～ bottom-dwelling tropical rays: skates
family Rallidae
— Navneord
– Engelsk
～ rails; crakes; gallinules; coots
Francoa ramosa
— Navneord
– Engelsk
～ Chilean evergreen shrub having delicate spikes of small white flowers