Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Nanoengineer Carson Bruns at the University of Colorado-Boulder has developed a tattoo ink that turns blue when it absorbs enough ultraviolet light — the idea being that it would alert someone when their sunscreen has worn off.