Wiktionary
microdose
n. (context medicine English) A very low dose (especially of radiation therapy)
Wikipedia
MicroDose
MicroDose is a trademark owned by Philips. It refers to a line of mammography equipment advertising a very low radiation dose. This equipment is based on a photon-counting detector for capturing the x-ray image.
Usage examples of "microdose".
Pramod was centuries old, and without the constant monitoring and prescription of dozens of microdose drugs and immune boosters, Pramod and Tili would age dozens of years each year, perhaps more depending on the level of stress.