| 释义 |
opisometer|ɒpɪˈsɒmɪtə(r)|
[f. Gr. ὀπίσω backwards + µέτρον measure.]
An instrument for measuring curved lines, as on a map, consisting of a small wheel turning on a screw fixed in a rod or frame; the wheel is rolled along the line to be measured, and then rolled back on a straight scale until it reaches its former position on the screw.
1872Black Adv. Phaeton iii. (1878) 33 The women were found in a wild maze of maps..and Bell had armed herself with an opisometer. |