transcription, транскрипция: [ noun ]
Date: 1571
: geometric mean ; especially : the square root (as x ) of the product of two numbers (as a and b ) when expressed as the means of a proportion (as a/x = x/b )
MEAN PROPORTIONAL
Meaning of MEAN PROPORTIONAL in English
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003