confocal (not comparable)
(optics, mathematics) Having the same foci
confocal (plural confocals)
Any of a pair of confocal mirrors or lenses
Source: Wiktionary
Con*fo"cal, a. (Math.)
Definition: Having the same foci; as, confocal quadrics.
Source: Webster’s Unabridged Dictionary 1913 Edition
4 May 2024
(noun) a chronic disease of unknown cause marked by the formation of nodules in the lungs and liver and lymph glands and salivary glands
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