|
|
|
|
|
|
|
1. WordNet® 3.0 (2006) |
focus
n 1: the concentration of attention or energy on something; "the
focus of activity shifted to molecular biology"; "he had no
direction in his life" [syn: focus, focusing,
focussing, focal point, direction, centering]
2: maximum clarity or distinctness of an image rendered by an
optical system; "in focus"; "out of focus"
3: maximum clarity or distinctness of an idea; "the controversy
brought clearly into focus an important difference of
opinion"
4: a central point or locus of an infection in an organism; "the
focus of infection" [syn: focus, focal point, nidus]
5: special emphasis attached to something; "the stress was more
on accuracy than on speed" [syn: stress, focus]
6: a point of convergence of light (or other radiation) or a
point from which it diverges [syn: focus, focal point]
7: a fixed reference point on the concave side of a conic
section
v 1: direct one's attention on something; "Please focus on your
studies and not on your hobbies" [syn: concentrate,
focus, center, centre, pore, rivet]
2: cause to converge on or toward a central point; "Focus the
light on this image" [ant: blur]
3: bring into focus or alignment; to converge or cause to
converge; of ideas or emotions [syn: concenter,
concentre, focalize, focalise, focus]
4: become focussed or come into focus; "The light focused" [syn:
focus, focalize, focalise] [ant: blur, dim, slur]
5: put (an image) into focus; "Please focus the image; we cannot
enjoy the movie" [syn: focus, focalize, focalise,
sharpen] [ant: blear, blur]
|
2. The Collaborative International Dictionary of English v.0.48 |
Focus \Fo"cus\, v. t. [imp. & p. p. Focused; p. pr. & vb. n.
Focusing.]
To bring to a focus; to focalize; as, to focus a camera. --R.
Hunt.
[1913 Webster]
|
3. The Collaborative International Dictionary of English v.0.48 |
Focus \Fo"cus\ (f[=o]"k[u^]s), n.; pl. E. Focuses
(f[=o]"k[u^]s*[e^]z), L. Foci (f[=o]"s[imac]). [L. focus
hearth, fireplace; perh. akin to E. bake. Cf. Curfew,
Fuel, Fusil the firearm.]
1. (Opt.) A point in which the rays of light meet, after
being reflected or refracted, and at which the image is
formed; as, the focus of a lens or mirror.
[1913 Webster]
2. (Geom.) A point so related to a conic section and certain
straight line called the directrix that the ratio of the
distance between any point of the curve and the focus to
the distance of the same point from the directrix is
constant.
[1913 Webster]
Note: Thus, in the ellipse FGHKLM, A is the focus and CD the
directrix, when the ratios FA:FE, GA:GD, MA:MC, etc.,
are all equal. So in the hyperbola, A is the focus and
CD the directrix when the ratio HA:HK is constant for
all points of the curve; and in the parabola, A is the
focus and CD the directrix when the ratio BA:BC is
constant. In the ellipse this ratio is less than unity,
in the parabola equal to unity, and in the hyperbola
greater than unity. The ellipse and hyperbola have each
two foci, and two corresponding directrixes, and the
parabola has one focus and one directrix. In the
ellipse the sum of the two lines from any point of the
curve to the two foci is constant; that is: AG + GB =
AH + HB; and in the hyperbola the difference of the
corresponding lines is constant. The diameter which
passes through the foci of the ellipse is the major
axis. The diameter which being produced passes through
the foci of the hyperbola is the transverse axis. The
middle point of the major or the transverse axis is the
center of the curve. Certain other curves, as the
lemniscate and the Cartesian ovals, have points called
foci, possessing properties similar to those of the
foci of conic sections. In an ellipse, rays of light
coming from one focus, and reflected from the curve,
proceed in lines directed toward the other; in an
hyperbola, in lines directed from the other; in a
parabola, rays from the focus, after reflection at the
curve, proceed in lines parallel to the axis. Thus rays
from A in the ellipse are reflected to B; rays from A
in the hyperbola are reflected toward L and M away from
B.
[1913 Webster]
3. A central point; a point of concentration.
[1913 Webster]
Aplanatic focus. (Opt.) See under Aplanatic.
Conjugate focus (Opt.), the focus for rays which have a
sensible divergence, as from a near object; -- so called
because the positions of the object and its image are
interchangeable.
Focus tube (Phys.), a vacuum tube for R[oe]ntgen rays in
which the cathode rays are focused upon the anticathode,
for intensifying the effect.
Principal focus, or Solar focus (Opt.), the focus for
parallel rays.
[1913 Webster]
|
4. The Free On-line Dictionary of Computing (30 December 2018) |
FOCUS
A hierarchical database language from
Information Builders, Inc.
(1994-12-21)
|
|
|
Thesaurus Results for Focus:
|
1. Moby Thesaurus II by Grady Ward, 1.0 |
adductor, approach, asymptote, attractant, attrahent, axiom, blurred, blurry, bottleneck, bring into focus, center, center of attraction, center of consciousness, center of interest, clear, collision course, concenter, concentralization, concentralize, concentrate, concentration, concourse, concurrence, confluence, conflux, congress, converge, convergence, converging, core, crossing, cynosure, distinct, elixir, essence, essential, fix, fixate, flower, focal point, focalization, focalize, focus of attention, fundamental, funnel, fuzzy, gist, gravamen, heart, hub, hypostasis, in focus, indistinct, inner essence, kernel, lodestar, lure, magnet, marrow, meat, meet, meeting, mutual approach, narrowing gap, nave, nerve, nub, nucleus, nuts and bolts, out of focus, pinpoint, pith, point of convergence, polestar, postulate, prime focus, principle, put, quid, quiddity, quintessence, radius, rivet, sap, soul, spirit, spokes, spotlight, stuff, substance, tangent, target, the nitty-gritty, unclear, woolly, zero in |
|
|
|
|
|
Common Misspellings > |
Focus oFocus oFcus FoFcus ocus FFocus Fcous Focous Fcus Foocus Foucs Focucs Fous Foccus Focsu Focusu Focs Focuus Focsus Focu Focuss eocus feocus efocus rocus frocus rfocus tocus ftocus tfocus docus fdocus dfocus gocus fgocus gfocus cocus fcocus cfocus vocus fvocus vfocus bocus fbocus bfocus ocus f ocus focus F9cus Fo9cus F9ocus F(cus Fo(cus F(ocus F0cus Fo0cus F0ocus Ficus Foicus Fiocus Fpcus Fopcus Fpocus Fkcus Fokcus Fkocus Flcus Folcus Flocus Facus Fecus Fucus Fosus Focsus Foscus Fodus Focdus Fodcus Fofus Focfus Fofcus Foxus Focxus Foxcus Fovus Focvus Fovcus Fo us Foc us Fo cus Foc7s Focu7s Foc7us Foc&s Focu&s Foc&us Foc8s Focu8s Foc8us Focys Focuys Focyus Focis Focuis Focius Fochs Focuhs Fochus Focjs Focujs Focjus Focks Focuks Fockus Focas Foces Focos Focuq Focusq Focuqs Focuw Focusw Focuws Focue Focuse Focues Focua Focusa Focuas Focud Focusd Focuds Focuz Focusz Focuzs Focux Focusx Focuxs Focuc Focusc Focucs Focu Focus Focu s Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
Full Map Index: Å Norway-Am Timan Chad |
Ama United States of America-Audon France |
Audouville-la-Hubert France-Baskil Turkey |
Baskin United States of America-Bindoy Philippines |
Bindoy Philippines-Breuilpont France |
Breukelen Netherlands-Campofelice di Fitalia Italy |
Campofelice di Roccella Italy-Champigny France |
Champigny-en-Beauce France-Colle San Magno Italy |
Colle Sannita Italy-Damulog Philippines |
Damurhuda Bangladesh-Duliāgaon India |
Duliajan No.1 India-Ethridge United States of America |
Étienville France-Frignano Italy |
Frignicourt France-Gouhenans France |
Gouillons France-Hasselbach Germany |
Hasselbach Germany-Hurlock United States of America |
Huron United States of America-Jovellanos Cuba |
Jovellar Philippines-Kirchzell Germany |
Kircubbin United Kingdom-La Gomera Guatemala |
La Gonfrière France-Le Hohwald France |
Le Hommet-dArthenay France-Loma de Gato Philippines |
Loma de Juárez Mexico-Mālpur India |
Mālpura India-Memphis United States of America |
Memphis United States of America-Montería Colombia |
Monteriggioni Italy-Navalilla Spain |
Navalmanzano Spain-Noyelles-lès-Seclin France |
Noyelles-lès-Vermelles France-Pachelma Russia |
Pachgaon India-Piégut-Pluviers France |
Piekary Śląskie Poland-Prilep Macedonia |
Přílepy Czech Republic-Reuil-en-Brie France |
Reuilly France-Şag Romania |
Şag Romania-Saint-Puy France |
Saint-Python France-Santa Rita Panama |
Santa Rita Venezuela-Sewarhi India |
Sewen France-Sparbu Norway |
Spardorf Germany-Tamparan Philippines |
Tampayan Philippines-Tottington United Kingdom |
Tottleben Germany-Valdivia Chile |
Valdivia Colombia-Villeneuve-le-Roi France |
Villeneuve-lès-Avignon France-White City United States of America |
White City Canada-Żywiec Poland |
|
Most Popular Searches: Define Misanthrope, Define Pulchritudinous, Define Happy, Define Veracity, Define Cornucopia, Define Almuerzo, Define Atresic, Define URL, Definitions Of Words, Definition Of Get Up, Definition Of Quid Pro Quo, Definition Of Irreconcilable Differences, Definition Of Word, Synonyms of Repetitive, Synonym Dictionary, Synonym Antonyms. See our main index and map index for more details.
|
©2011-2024 ZebraWords.com - Define Yourself - The Search for Meanings and Meaning Means I Mean. All content subject to terms and conditions as set out here. Contact Us, peruse our Privacy Policy |
|