In a confocal manner; in a way that shares or relates to the same focus or focal axis.
From confocal (having the same focus) plus the adverbial suffix -ly. A technical term used primarily in optics and microscopy.
You'll find this word almost exclusively in scientific papers about microscopy or advanced optics—it's the kind of word that makes scientists sound impossibly smart even though it just means 'in a focused way.'
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