[ 'trʌɪju:n ]
■ adjective (especially with reference to the Trinity) consisting of three in one.
Derivatives
triunity noun ( plural triunities ).
Origin
C17: from tri- + L. unus 'one'.
TRIUNE
Meaning of TRIUNE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004