focal point

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focal point

n.
See focus.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

focal point

n
1. (General Physics) Also called: principal focus or focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection
2. a central point of attention or interest
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

fo′cal point`


n.
1. either of two points on the axis of a mirror, lens, or other optical system, on which rays converge or from which they deviate.
2. the center of activity or attention.
3. the central or principal point of focus.
[1705–15]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.focal point - a point of convergence of light (or other radiation) or a point from which it diverges
point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street"
2.focal point - a central point or locus of an infection in an organismfocal point - a central point or locus of an infection in an organism; "the focus of infection"
point - the precise location of something; a spatially limited location; "she walked to a point where she could survey the whole street"
focal infection - bacterial infection limited to a specific organ or region especially one causing symptoms elsewhere
3.focal point - the concentration of attention or energy on something; "the focus of activity shifted to molecular biology"; "he had no direction in his life"
engrossment, immersion, absorption, concentration - complete attention; intense mental effort
particularism - a focus on something particular
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations

focal point

n (fig) → centro; (of lens, mirror) → punto focale
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
The principle of all plus-lens magnifiers is the same: the magnification remains constant regardless of the eye-to-magnifier distance providing that the object is placed at the anterior focal point. (7) However, this is rarely done in practice and leads us to another question which is what glasses should patients use with their magnifiers?
In order to overcome the issue of placing the object accurately at the anterior focal point of the magnifying lens, the lens can be mounted in a stand to fix the position.

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