- photography using infrared-sensitive film that produces images in which heat-emitting areas or objects appear red.
Origin of false color
- the flag of a country other than one's own, especially when used deceptively: sailing under false colors.
- false or deceptive actions or statements; misrepresentation.
Origin of false colors
Pretense, misrepresentation, or hypocrisy; deceptive statements or actions. For example, She's sailing under false colors—she claims to be a Republican, but endorses Democratic legislation. This term alludes to the practice of pirate ships sailing under false colors—that is, running a particular flag specifically to lure another vessel close enough to be captured. [Late 1600s]