entire function
complex-valued function that is holomorphic at all finite points over the whole complex plane
en-US/ɛnˈtaɪɚ ˈfʌŋkʃən/
en-GB/ɪnˈtaɪə ˈfʌŋkʃn/
complex-valued function that is holomorphic at all finite points over the whole complex plane