TERTIUM QUID


Meaning of TERTIUM QUID in English

[ ˌtə:ʃɪəm'kwɪd , ˌtə:tɪəm ]

■ noun an indefinite and undefined third thing related to two definite or known things.

Origin

C18: from late L., translation of Gk triton ti 'some third thing'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.