| aglow |
shining with a soft light; glowing; bright. [1/2 definitions] |
| airy |
having a light, delicate look. [1/2 definitions] |
| almond |
a light tan color like the inner part of the seed of the almond. [1/3 definitions] |
| aluminium |
the British spelling of "aluminum," a strong, light, silver metal that does not easily rust. |
| aluminum |
a strong, light, silver metal that does not easily rust. Aluminum is a chemical element. (symbol: Al) |
| aperture |
an opening that controls the amount of light that reaches the lens on a camera. [1/2 definitions] |
| Apollo |
the god of light, music, poetry, and healing in Greek and Roman mythology. Apollo was also the god of prophecy. People travelled to his shrine at Delphi to ask questions about future events. |
| aurora australis |
bands of light that appear in the skies at night near the South Pole; southern lights. |
| aurora borealis |
bands of light that appear in the skies at night near the North Pole; northern lights. |
| balloon |
a small bag made of rubber or other strong, light material that can be filled with air, or a gas lighter than air, and used as a decoration or toy. [1/3 definitions] |
| balsa |
a tree of tropical America, whose wood is very light in weight. [1/2 definitions] |
| beacon |
a signal of light or radio waves that guides or warns ships or aircraft. |
| beam |
a narrow ray of light. [1/5 definitions] |
| beryllium |
a hard, light, gray substance that is one of the chemical elements. Beryllium is sometimes combined with other elements to form an alloy. It is also used in building rockets. (symbol: Be) |
| bicycle |
a light vehicle with two wheels, one behind the other, a small seat, and handlebars for steering. Pedals make the wheels move. [1/2 definitions] |
| bioluminescence |
light given off naturally by certain kinds of insects, fish, or bacteria. The bioluminescence of fireflies allows them to blink on and off in the dark. |
| black |
very dark; without light. [1/7 definitions] |
| black hole |
a region or body in space with gravity so strong that neither light nor matter can escape it. Scientists believe that black holes form when very large stars collapse. |
| blaze1 |
a bright flame or light. [1/4 definitions] |
| blaze2 |
a white or light mark on the face of a cow or horse. [1/3 definitions] |
| blinker |
a flashing light, especially one used on a car to signal that the car will turn and to show which way it will turn. |