heliographs
基本解释
n. 照相制版, 太阳摄影机, 日光仪( heliograph的名词复数 )
英文释义
n an apparatus for sending telegraphic messages by using a mirror to turn the sun's rays off and on
v signal by means of a mirror and the using the sun's rays
词形变化
上一个单词：heliographing
下一个单词：heliography