directrix

== English == === Alternative forms === directrice === Etymology === Learned borrowing from Latin dīrēctrīx. By surface analysis, direct +‎ -trix. === Pronunciation === enPR: dĭ-rĕk′trĭks, dī- (Received Pronunciation) IPA(key): /dɪˈɹɛk.tɹɪks/, /-ˈɹek-/; /daɪ̯-/, /dʌɪ̯-/ (General American, Canada) IPA(key): /dɪˈɹɛk.tɹɪks/; /daɪ̯-/ (General Australian) IPA(key): /dɪˈɹek.tɹɪks/; /dɑe̯-/ (New Zealand) IPA(key): /dəˈɹek.tɹəks/; /dɑe̯-/ (Scotland) IPA(key): /dɪˈɹɛk.tɹɪks/; /dʌi̯-/, /dəi̯-/ (India) IPA(key): /ɖɪˈɾɛ(ː)k.ʈɾɪks/; /ɖəj-/, /ɖɑːj-/ Rhymes: -ɛktrɪks Hyphenation: di‧rec‧trix === Noun === directrix (plural directrixes or directrices) Female equivalent of director. (geometry) A line used to define a curve or surface; especially a line, the distance from which a point on a conic has a constant ratio to that from the focus. ==== Derived terms ==== ==== Translations ==== === References === “directrix, n.”, in OED Online ⁠, Oxford: Oxford University Press, 2025. === Further reading === “directrix”, in OneLook Dictionary Search. === Anagrams === creditrix == Latin == === Etymology === From dīrēctus + -trīx. === Pronunciation === (Classical Latin) IPA(key): [diːˈreːk.triːks] (modern Italianate Ecclesiastical) IPA(key): [diˈrɛk.triks] Hyphenation: dī‧rēc‧trīx === Noun === dīrēctrīx f (genitive dīrēctrīcis, masculine dīrēctor); third declension female equivalent of dīrēctor ==== Declension ==== Third-declension noun. === Further reading === R. E. Latham, D. R. Howlett, & R. K. Ashdowne, editors (1975–2013), “directrix”, in Dictionary of Medieval Latin from British Sources‎[1], London: Oxford University Press for the British Academy, →ISBN, →OCLC