"Confocal" is a word in ENGLISH
confocal
ENGLISH
Definition:
Having the same foci; as, confocal quadrics.
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Because fear kills everything," Mo had once told her. "Your mind, your heart, your imagination.
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A guy walks into a laundry run by cats. "Excuse me", he said tothe cat in charge, "Can you get milk stains out?" "Sure," repliedthe cat. "We'll have that stain licked in a minute!"
aberration
ENGLISH
The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same …
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ENGLISH
of Focus
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ENGLISH
A curve formed by a section of a cone, when the cutting plane makes a greater angle with the base …
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ENGLISH
One of foci of an ellipse, or other curve.
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