| Webster's Online Dictionary |
| Part of Speech | Definition | |
| Expression | 1. An eyepiece used in telescopes for viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position.[Websters]. | |
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| Expressions | Definition | ||
| Erecting eyepiece | An eyepiece used in telescopes for viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position. Source: Webster's Revised Unabridged Dictionary. | ||
Source: compiled by the editor from various references; see credits. | Top | ||