| Subject | English | Basque |
| math. | complex abnormal curve | konplexua anormal kurba |
| math. | complex experiment | konplexua esperimentu |
| environ. | complex formation Formation of a complex compound. Also known as complexing or complexation | konplexu-eraketa |
| math. | complex Gaussian distribution | Gauss-banaketa konplexua |
| comp., MS | complex number | zenbaki konplexu (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 | idazkera konplexu (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 | konplexua taula |
| math. | complex unit | unitate konplexuak |
| math. | complex Wishart distribution | konplexua Wishart banaketa |
| environ. | complexing agent A substance capable of forming a complex compound with another material in solution | agente konplexu-eratzaile |