heliometer(redirected from heliometrical)
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A telescope equipped to measure small angular distances between celestial bodies or the angular sizes of celestial bodies.
he′li·o·met′ric (-ə-mĕt′rĭk), he′li·o·met′ri·cal adj.
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.
(Astronomy) a refracting telescope having a split objective lens that is used to determine very small angular distances between celestial bodies
heliometric, ˌhelioˈmetrical adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
he•li•om•e•ter(ˌhi liˈɒm ɪ tər)
a telescope with a divided, adjustable objective, formerly used to measure small angular distances, as those between celestial bodies.
he`li•o•met′ric (-əˈmɛ trɪk) he`li•o•met′ri•cal, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
an instrument originally designed for measuring the sun’s diameter, now used for measuring the angular distance between stars.See also: Astronomy, Instruments
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
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|Noun||1.||heliometer - an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope|
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