annual-parallax
annual parallax
noun
See under parallax ( def 2 ).
Dictionary.com Unabridged
əˌlæks noun
1.
the apparent displacement of an observed object due to a change in the position of the observer.
2.
Astronomy. the apparent angular displacement of a celestial body due to its being observed from the surface instead of from the center of the earth (diurnal parallax or geocentric parallax) or due to its being observed from the earth instead of from the sun (annual parallax or heliocentric parallax) Compare parallactic ellipse.
3.
the difference between the view of an object as seen through the picture-taking lens of a camera and the view as seen through a separate viewfinder.
4.
an apparent change in the position of cross hairs as viewed through a telescope, when the focusing is imperfect.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To annual-parallax
00:10
Annual-parallax
is always a great word to know.
So is callithumpian. Does it mean:
| a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes. |
| a fool or simpleton; ninny. |
Collins
parallax (ˈpærəˌlæks) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| 1. | an apparent change in the position of an object resulting from a change in position of the observer |
| 2. | astronomy the angle subtended at a celestial body, esp a star, by the radius of the earth's orbit. Annual or heliocentric parallax is the apparent displacement of a nearby star resulting from its observation from the earth. Diurnal or geocentric parallax results from the observation of a planet, the sun, or the moon from the surface of the earth |
| [C17: via French from New Latin parallaxis, from Greek: change, from parallassein to change, from | |
| parallactic | |
| —adj | |
| paral'lactically | |
| —adv | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History
parallax
1580, from M.Fr. parallaxe (1557), from Gk. parallaxis "change, alteration, inclination of two lines meeting at an angle," from parallassein "to alter, make things alternate," from para- "beside" + allassein "to change," from allos "other" (see alias).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
parallax  (pār'ə-lāks') Pronunciation Key
(click for larger image in new window) An apparent shift in the position of an object, such as a star, caused by a change in the observer's position that provides a new line of sight. The parallax of nearby stars caused by observing them from opposite points in Earth's orbit around the Sun is used in estimating the stars' distance from Earth through triangulation. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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