[ 'tɛtrad ]
■ noun technical a group or set of four.
Origin
C17: from Gk tetras , ~- 'four, a group of four'.
TETRAD
Meaning of TETRAD in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004
[ 'tɛtrad ]
■ noun technical a group or set of four.
Origin
C17: from Gk tetras , ~- 'four, a group of four'.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004