feminine singular of escuro

camera obscura (dark chamber with a small orifice into which an object is projected) / darkroom (a dark room, where photographs are developed)

(astronomy) dark matter (particles of matter that cannot be detected by their radiation)

(astrophysics) dark energy (hypothetical form of energy which is spread uniformly throughout space and time and has anti-gravitational properties)

feminine plural of escuro

in the dark (without light) / in the dark (without information) / under wraps (in secrecy)

plural of câmara escura