英语词源字典 - 在线词源网站

beryl (n.)[beryl 词源字典]: hard, lustrous mineral, c. 1300, from Old French beryl (12c., Modern French béryl), from Latin beryllus, from Greek beryllos, perhaps from Prakrit veruliya, from Sanskrit vaidurya-, of Dravidian origin, perhaps from the city of Velur (modern Belur) in southern India.

Medieval Latin berillus also was applied to any precious stone of a pale green color, to fine crystal, and to eyeglasses (the first spectacle lenses may have been made of beryl), hence German Brille "spectacles," from Middle High German berille "beryl," and French besicles (plural) "spectacles," altered 14c. from Old French bericle.[beryl etymology, beryl origin, 英语词源]
meniscus (n.): "crescent-shaped body," 1690s in reference to lenses, c. 1812 in reference to liquid surfaces, Modern Latin meniscus, from Greek meniskos "lunar crescent," diminutive of mene "moon" (see moon (n.)). Related: Meniscoid.
spectacles (n.): "glass lenses to help a person's sight," early 15c., from plural of spectacle. Earlier in singular form (late 14c.).
sunglasses (n.): glasses with darkened lenses to protect one's eyes while observing the sun, also sun-glasses, 1878, from sun (n.) + glasses. In popular (non-astronomy) use from 1916. Earlier sunglass (1804) meant a burning glass.
telephoto (adj.): also tele-photo, 1898, shortened form of telephotographic (1892), in reference to lenses introduced at that time to increase the magnification of photographs taken by a camera, from tele- + photographic.