welcome, M!

here's what came up in my Apple dictionary:

parenteral |pəˈrentərəl|
adjective Medicine
administered or occurring elsewhere in the body than the mouth and alimentary canal : parenteral nutrition. Often contrasted with enteral .
DERIVATIVES
parenterally adverb
ORIGIN early 20th cent.: from para- 1 [beside] + Greek enteron ‘intestine’ + -al .

formerly known as etaoin...