| Webster's Online Dictionary |
| Part of Speech | Definition | |
| Expression | 1. A species of double image micrometer, in which the two images are formed by the double refraction of rock crystal.[Websters]. | |
| Top | ||
| Expressions | Definition | ||
| Double refraction micrometer | A species of double image micrometer, in which the two images are formed by the double refraction of rock crystal. Source: Webster's Revised Unabridged Dictionary. | ||
Source: compiled by the editor from various references; see credits. | Top | ||