Origin: Latin suffix -ous
Intravenous has 3 different meanings across 1 category:
A dose of medicine administered from a drip, down through a hollow needle inserted into a patient's vein.
"The doctor decided to administer the emergency medication intravenously because the patient needed it immediately and could not swallow pills."
within or by means of a vein
"an intravenous inflammation"
"intravenous feeding"
Inside the veins.
"The nurse carefully inserted the needle into my arm to administer the intravenous saline solution."