Usage Note
Pupille is the pupil of the eye, the dark opening that widens or narrows with light. It is purely anatomical; a school pupil is Schüler, never Pupille.
Examples
"Im Dunkeln weiten sich die Pupillen."
Natural Translation
In the dark the pupils widen.
Literal Translation
In-the dark widen themselves the pupils.

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Related Words
- Akkommodation accommodation (focusing adjustment of the eye lens)
- Anosmie anosmia, loss of smell
- Blick look
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- Brennen burning sensation
- Dunkeladaptation dark adaptation (eye adjustment from light to darkness)
- Dämmerungssehen twilight vision, scotopic vision
- Eigengeruch body odour; characteristic personal scent
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