parfocal

adjective
par·​fo·​cal | \ˌpär-ˈfō-kəl \

Definition of parfocal 

: being or having lenses or lens sets (such as eyepieces) with the corresponding focal points all in the same plane

Other Words from parfocal

parfocality \ˌpär-​fō-​ˈka-​lə-​tē \ noun
parfocalize \ˌpär-​ˈfō-​kə-​ˌlīz \ transitive verb

First Known Use of parfocal

circa 1886, in the meaning defined above

History and Etymology for parfocal

Latin par equal + English focal

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The first known use of parfocal was circa 1886

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More Definitions for parfocal

parfocal

adjective
par·​fo·​cal | \(ˈ)pär-ˈfō-kəl \

Medical Definition of parfocal 

: having corresponding focal points all in the same plane : having sets of objectives or eyepieces so mounted that they may be interchanged without varying the focus of the instrument (as a microscope) with which they are used

Other Words from parfocal

parfocality \-​fō-​ˈkal-​ət-​ē \ noun plural -ties

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