While most of us are limited to the visible spectrum, people with a condition called aphakia possess ultraviolet vision. Aphakia is the lack of a lens, due to surgical removal for cataracts or congenital defects.
A railroad lantern and a railroad lamp are two different things. Lanterns were designed to be portable (i.e. carried) and were basically globes surrounded by a metal frame with a fuel source. When you think of a railroad worker swinging a signal, think lantern.
Lantern (noun). a smaller and secondary cupola crowning a larger one, for ornament, or to admit light; such as the lantern of the cupola of the Capitol at Washington, or that of the Florence cathedral. Lantern (noun). a lantern pinion or trundle wheel.iktionary (0.00 / 0 votes) Rate this definition: lantern (Noun). A case of translucent or transparent material made to protect a flame, or light, used to illuminate its surroundings. Origin: Middle English (13th century), via Old French lanterne from lanterna, itself a corruption of.