| flexura sigmoidea | <anatomy> The portion of the colon that connects to the descending colon above and the rectum below. (27 Sep 1997) |
|---|---|
| flexural | Relating to a flexure. (05 Mar 2000) |
| flexural eczema | Eczema of skin at the flexures of elbow, knees, wrists, etc., associated with atopy persisting through childhood. (05 Mar 2000) |
| flexure | 1. The act of flexing or bending; a turning or curving; flexion; hence, obsequious bowing or bending. "Will it give place to flexure and low bending?" (Shak) 2. A turn; a bend; a fold; a curve. "Varying with the flexures of the valley through which it meandered." (British Quart. Rev) 3. <zoology> The last joint, or bend, of the wing of a bird. 4. <astronomy> The small distortion of an astronomical instrument caused by the weight of its parts; the amount to be added or substracted from the observed readings of the instrument to correct them for this distortion. <mathematics> The flexure of a curve, the bending of a curve towards or from a straight line. Origin: L. Flexura. Source: Websters Dictionary (01 Mar 1998) |
| flick movements | Rapid, involuntary fixation movements of the eye of 5 to 10 minutes of arc. Synonym: flick movements. (05 Mar 2000) |
| flicker | 1. The act of wavering or of fluttering; flucuation; sudden and brief increase of brightness; as, the last flicker of the dying flame. 2. <zoology> The golden-winged woodpecker (Colaptes aurutus); so called from its spring note. Called also yellow-hammer, high-holder, pigeon woodpecker, and yucca. "The cackle of the flicker among the oaks." (Thoureau) Source: Websters Dictionary (01 Mar 1998) |
| flicker fusion | The point or frequency at which all flicker of an intermittent light stimulus disappears. (12 Dec 1998) |
| flicker fusion frequency technique | A technique of perimetry using the criterion of critical fusion frequency. Synonym: flicker fusion frequency technique. (05 Mar 2000) |
| flicker perimetry | A technique of perimetry using the criterion of critical fusion frequency. Synonym: flicker fusion frequency technique. (05 Mar 2000) |
| flickermouse | <zoology> See Flittermouse. Source: Websters Dictionary (01 Mar 1998) |
| flicks | Rapid, involuntary fixation movements of the eye of 5 to 10 minutes of arc. Synonym: flick movements. (05 Mar 2000) |
| Flieringa's ring | A stainless steel ring sutured to the sclera to prevent collapse of the globe in difficult intraocular operations. (05 Mar 2000) |
| Flieringa, Henri | <person> Dutch ophthalmologist, *1891. See: Flieringa's ring. (05 Mar 2000) |
| flight | 1. The act or flying; a passing through the air by the help of wings; volitation; mode or style of flying. "Like the night owl's lazy flight." (Shak) 2. The act of fleeing; the act of running away, to escape or expected evil; hasty departure. "Pray ye that your flight be not in the winter." (Matt. Xxiv. 20) "Fain by flight to save themselves." (Shak) 3. Lofty elevation and excursion;a mounting; a soaing; as, a flight of imagination, ambition, folly. "Could he have kept his spirit to that flight, He had been happy." (Byron) "His highest flights were indeed far below those of Taylor." (Macaulay) 4. A number of beings or things passing through the air together; especially, a flock of birds flying in company; the birds that fly or migrate together; the birds produced in one season; as, a flight of arrows. "Swift flights of angels ministrant." (Milton) "Like a flight of fowl Scattered winds and tempestuous gusts." (Shak) 5. A series of steps or stairs from one landing to another. 6. A kind of arrow for the longbow; also, the sport of shooting with it. See Shaft. "Challenged Cupid at the flight." (Shak) "Not a flight drawn home E'er made that haste that they have." (Beau. & Fl) 7. The husk or glume of oats. <zoology> Flight feathers, the wing feathers of a bird, including the quills, coverts, and bastard wing. See Bird. To put to flight, To turn to flight, to compel to run away; to force to flee; to rout. Synonym: Pair, set. See Pair. Origin: AS. Fliht, flyht, a flying, fr. Fleogan to fly; cf. Flyht a fleeing, fr. Fleon to flee, G. Flucht a fleeing, Sw. Flykt, G. Flug a flying, Sw. Flygt, D. Vlugt a fleeing or flying, Dan. Flugt. See Flee, Fly. Source: Websters Dictionary (01 Mar 1998) |
| flight blindness | Visual blackout in aviators. See: amaurosis fugax. (05 Mar 2000) |