Reflection

Reflection it is related that Pythagoras could write what he placed on a glass, and, by the reflection of the same species, would make those letters appear upon the circle of the moon, so plain as to be read by any person, some miles distant from him. Cornelius Agrippa affirms the possibility of it, and that the method of performing it was known to himsself and others.

Definition taken from The Universal Etymological English Dictionary, edited by Nathan Bailey (1736)

Rectaˊngular [with Geom.] * Remeˊmbrancer