con·fo·cal
(kŏn-fō′kəl)adj. Having the same focus or foci. Used of a lens.
con·fo′cal·ly adv.
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.
confocal
(kɒnˈfəʊkəl) adj (General Physics) having a common focus or common foci: confocal ellipses.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
con•fo•cal
(kɒnˈfoʊ kəl)
adj. having the same focus or foci.
[1865–70]
con•fo′cal•ly, adv.
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