perspective glass

名词 n.
中文释义

英文释义

名词 n.
  1. A kind of early telescope.
    — The instrument was at first called Galileo's tube; the double eye-glass; the perspective; the trunk; the cylinder.
  2. An instrument for viewing an enlarged image of engraved prints or maps http://www.monticello.org/site/research-and-collections/perspective-glass. historical

词形变化

perspective glasses plural
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