0 an extremely small dose (= measured amount) of a medicine or drug: --
A microdose is generally considered to be one-20th to one-tenth of a recreational dose.
In homoeopathy, illnesses are treated using highly diluted forms of herbs and minerals, known as microdoses, that in higher quantities could give rise to the same problems as those that are being treated.
1 to take a very small dose (= measured amount) of a psychedelic drug (= one that affects the mind) in an attempt to become better at solving problems or at thinking of new ideas, or to treat medical problems such as anxiety, depression, or headaches: --