"Confocal" is a word in ENGLISH

confocal ENGLISH
Definition:

Having the same foci; as, confocal quadrics.

Few words of positivity

Because fear kills everything," Mo had once told her. "Your mind, your heart, your imagination.

Cornelia Funke, Inkheart

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Laugh your heart out.

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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hyperbola 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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umbilicus ENGLISH

One of foci of an ellipse, or other curve.

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