[ trʌɪ'kɒtəmi , trɪ- ]
■ noun ( plural trichotomies ) a division into three categories.
Derivatives
trichotomous adjective
Origin
C17: from Gk trikha 'threefold', on the pattern of dichotomy .
TRICHOTOMY
Meaning of TRICHOTOMY in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004