eter Noun, m, eter

1. (organic compound) ether (compound containing an oxygen atom bonded to two hydrocarbon groups)
2. (archaic, physics) ether (substance once thought to fill all space)

Appox. usage (any sense): 1.85 per million words

eter Noun, n, eter

1. (figurative) air, sky, atmosphere
2. (ancient philosophy, and, alchemy, uncountable) ether (classical physical element)

Appox. usage (any sense): 1.84 per million words

efir Noun, efir

1. (organic compound, dated) ether

Appox. usage (any sense): less than 0.1 per million words