a type of telescope with a convex objective lens and a concave eyepiece; it produces an erect image and is suitable for terrestrial use
Galilean telescope in American English
noun
a refracting telescope that forms an erect image, consisting of an objective of relatively long focal length that causes light rays to converge and an eyepiece of short focal length that causes them to diverge
Word origin
[1715–25]This word is first recorded in the period 1715–25. Other words that entered Englishat around the same time include: anesthesia, leverage, portfolio, screening, trio