| Subject | English | Icelandic |
| math. | complex abnormal curve | flókin óeðlilegt ferli |
| math. | complex experiment | flókin tilraun |
| math. | complex Gaussian distribution | flókin Gauss dreifing |
| comp., MS | complex network | flókið net (A type of operations network in which simultaneous operations take place or in which operations overlap, are contingent on each other, or have other complex relationships) |
| comp., MS | complex number | tvinntala (A number in the form a + bi, where a and b are real numbers and i = sqrt(-1) , so that bi is imaginary unless b = 0) |
| comp., MS | complex script | tengiskrift (A language whose characters require ligation or shaping, such as a right-to-left language (Arabic, Persian, Hebrew, and Urdu) or certain South Asian languages) |
| math. | complex table | flókin borð |
| math. | complex unit | flóknum eining |
| math. | complex Wishart distribution | flókin Wishart útbreiðsla |