Merriam-Webster's Dictionary and Thesaurus - Merriam-Webster [538]
[3] easy, effortless, facile, fluent, light, ready, smooth
2fluid noun : a substance (as a liquid or gas) tending to flow or take the shape of its container
fluid dram or flu·i·dram noun : a unit of liquid measure equal to 1/8 fluid ounce
fluid ounce noun : a unit of liquid measure equal to 1/16 pint in the U.S. or 1/20 pint in the U.K.
1fluke noun : any of various trematode flatworms
2fluke noun 1 : the part of an anchor that fastens in the ground
2 : a lobe of a whale's tail
3fluke noun : a stroke of luck
fluky also fluk·ey adjective 1 : happening or depending on chance rather than skill
2 : light and uncertain
Synonyms
accidental, casual, chance, fortuitous, incidental, unplanned
flume noun 1 : an inclined channel for carrying water
2 : a ravine or gorge with a stream running through it
Synonyms
[1] aqueduct, canal, channel, conduit, raceway, watercourse—more at CHANNEL
[2] canyon, gorge, gulch, ravine—more at CANYON
flung past and past participle of FLING
flunk verb : to fail esp. in an examination or course
— flunk noun
Synonyms
collapse, fail, flop, fold, wash out—more at FAIL
flun·ky also flun·key or flun·kie noun, plural flunkies also flunkeys 1 a : a liveried servant
b : one performing menial or miscellaneous duties
2 : YES-MAN
Synonyms
domestic, lackey, menial, retainer, servant, steward—more at SERVANT
fluo·res·cence noun 1 : luminescence caused by radiation absorption that ceases almost immediately after the incident radiation has stopped
2 : visible emitted radiation
— fluo·resce verb
— fluo·res·cent adjective
Synonyms
glow, illumination, incandescence, light, luminescence, radiance, shine—more at LIGHT
fluorescent lamp noun : a tubular electric lamp in which light is produced by the action of ultraviolet light on a fluorescent material that coats the inner surface of the lamp
fluo·ri·date verb -dat·ed; -dat·ing : to add a fluoride to (as drinking water) to reduce tooth decay
— fluo·ri·da·tion noun
fluo·ride noun : a compound of fluorine
fluo·ri·nate verb -nat·ed; -nat·ing : to treat or cause to combine with fluorine or a compound of fluorine
— fluo·ri·na·tion noun
fluo·rine noun : a pale yellowish flammable irritating toxic gaseous chemical element
fluo·rite noun : a mineral that consists of the fluoride of calcium used as a flux and in making glass
fluo·ro·car·bon noun : a compound containing fluorine and carbon used chiefly as a lubricant, refrigerant, or nonstick coating; also : CHLOROFLUOROCARBON
fluo·ro·scope noun : an instrument for observing the internal structure of an opaque object (as the living body) by means of X-rays
— fluo·ro·scop·ic adjective
— fluo·ros·co·py noun
fluo·ro·sis noun : an abnormal condition (as spotting of the teeth) caused by fluorine or its compounds
flu·ox·e·tine noun : an antidepressant drug that enhances serotonin activity
flur·ry noun, plural flurries 1 : a gust of wind
2 : a brief light snowfall
3 : COMMOTION, BUSTLE
4 : a brief outburst of activity — flurry verb Synonyms [1] blast, blow, gust, williwaw—more at GUST [4] burst, flash, outbreak, outburst, spurt—more at OUTBREAK 1flush verb : to cause (a bird) to fly away suddenly 2flush noun : a hand of cards all of the same suit 3flush noun 1 : a sudden flow (as of water)