helioscope 的定义
- a telescope for viewing the sun, adapted to protect the eye of the viewer from the sun's glare.
更多helioscope例句
- A few words must here be said concerning the helioscope, which on more than one occasion played a prominent part in this war.
- To the "helioscope" employed by Father Scheiner two centuries and a quarter earlier, a species of micrometer was added.