parfocal

[pahr-foh-kuhl]

par·fo·cal

[pahr-foh-kuhl]
adjective Optics.
of or pertaining to different eyepieces (of telescopes or microscopes) that all focus their images in the same plane, so that they can be interchanged without readjusting the instrument.

Origin:
1885–90; par1 + focal
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Parfocal is always a great word to know.
So is interrobang. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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