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).
Holders of official and diplomatic passports on official business must obtain a visa from a Turkish embassy or consulate before arrival in Turkey. All travelers planning to stay more than three months for any purpose are required to obtain a visa from a Turkish embassy or consulate.Such travelers must also apply for a residence/work permit or Turkish ID card within the first month of their arrival in Turkey.isa Requirements. American citizens traveling to Turkey on U.S. passports must obtain a visa. Currently, holders of all types of passports can purchase a 90-day sticker visa at the port of entry for $20 cash if they are traveling to Turkey as tourists.