morphine

n. the primary active ingredient in opium, first synthesized in 1806 and widely used as an analgesic and sedative. It interacts predominantly with the mu opioid receptor. Prolonged administration or abuse can lead to dependence and to withdrawal symptoms on cessation. The substance is 10 times as potent as opium for pain relief. See opioid intoxication; opioid use disorder.

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Psychology term of the day

November 17th 2024

oncology

n. the study and treatment of benign and malignant tumors (see neoplasm). This branch of medicine and of behavioral or population sciences deals with cancer and is subdivided into medical, radiation, surgical, behavioral, and epidemiological subtypes. —oncologist n.