A large historical square in central Moscow.

A signal or process with a frequency spectrum such that the spectral energy density is proportional to the reciprocal of the frequency squared (1/f²).

(historical) A former Marxist-Leninist militant group based in Italy.

A stock or other investment in perceived high value and reliable company of the People's Republic of China.

The People's Republic of China.

plural of red ant

having red hair

(astronomy) Light spectra shifted towards red, as by elongation of light waves from a source moving away from the detector.

Alternative form of infrared

plural of red ribbon