directrix (dÉªËrÉktrÉªks; daÉª-) n. 1. (Mathematics) geometry a fixed reference line, situated on the convex side of a conic section, that is used when defining or calculating its eccentricity. 2. (Professions) a directress [C17: New Latin, feminine of director] diâ¢recâ¢trix (dÉªËrÉk trÉªks, daÉª-)
e-Visa [edit]. Turkish e-visa can be obtained prior to arrival or on arrival (for a higher cost). Citizens of these countries are eligible to apply for a multiple entry e-Visa which allows to stay up to 90 days (unless otherwise stated):1  Antigua and Barbuda. 2  Armenia #. - Countries whose citizens are allowed to enter Turkey with their expired passports (up to 5 years). 3 - Allowed to enter Turkey with their passports or ID cards expired within the last year. Turkish e-visa can be obtained prior to arrival or on arrival (for a higher cost).
However, the Turkish government has said that after April 10, 2014, it will not be possible to get a visa on arrival in Turkey. Visitors arriving in Turkey on or after this date will have to obtain an e-visa online before travel.The price will still be $20, and the visa will be valid for 180 days after the date of arrival and for multiple entries.owever, the Turkish government has said that after April 10, 2014, it will not be possible to get a visa on arrival in Turkey. Visitors arriving in Turkey on or after this date will have to obtain an e-visa online before travel.