noun
: a microwave absorption spectrum (as of ammonia vapor) attributed in quantum mechanics to quantized changes in molecular structure from one arrangement to another that is the mirror image of the first
noun
: a microwave absorption spectrum (as of ammonia vapor) attributed in quantum mechanics to quantized changes in molecular structure from one arrangement to another that is the mirror image of the first
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012