DIRECTRIX


Meaning of DIRECTRIX in English

[ dɪ'rɛktrɪks , dʌɪ- ]

■ noun ( plural directrices -trɪsi:z ) Geometry a fixed line used in describing a curve or surface.

Origin

C18: from med. L., lit. 'directress'.

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.