gastrointestinal
Concise Oxford English Dictionary © 2008 Oxford University Press:
gastrointestinal /ˌgastrəʊɪnˈtɛstɪn(ə)l, -ɪntɛsˈtʌɪn(ə)l/
▶adjective relating to the stomach and the intestines.
'gastrointestinal' also found in these Oxford entries:

