English word aperture comes from Proto-Indo-European *h₂pó (Off, away, from.), Proto-Indo-European *wer-iō
| Dictionary entry | Language | Definition |
|---|---|---|
| *h₂pó | Proto-Indo-European (ine-pro) | Off, away, from. |
| *wer-iō | Proto-Indo-European (ine-pro) | open |
| cooperio | Latin (lat) | I cover wholly, cover over, overwhelm. |
| apertus | Latin (lat) | |
| apertura | Latin (lat) | An opening (action). An opening, hole, aperture. |
| aperture | English (eng) | (astronomy, photography) The diameter of the aperture (in the sense above) which restricts the width of the light path through the whole system. For a telescope, this is the diameter of the objective lens.. (mathematics, rare, of a right circular cone) The maximum angle between the two generatrices.. (optics) Something which restricts the diameter of the light path through one plane in an [...] |