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bn:03603486n
Noun Concept
SYL
No term available
EN
A reading stone is an approximately hemispherical lens that can be placed on top of text to magnify the letters so that people with presbyopia can read it more easily. Wikipedia
Relations
Sources
IS A
EN
hand glass
EN
lens
DISCOVERER OR INVENTOR
EN
Alhazen
USE
EN
hand glass

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