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A medico is a doctor. The word is informal, a little old-fashioned, and often slightly — the sort of thing you hear in an old film, a crime story, or from someone trying to sound casual: “You’d better see a medico.” On a clinic door, in a school essay, or when you want to be polite, you say doctor. Medico is not rude, but it is not the careful or official word either. Some older speakers and some military talk still like it. Though actually, in Italian and Spanish, medico is simply the ordinary word for doctor. English borrowed the sound and kept it as slang.
醫生（口語、帶點開玩笑；正式場合說 doctor）
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
mediconoun
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informalA physician or medical doctor; sometimes also a medical student.
- 1894, Ivan Dexter, Talmud: A Strange Narrative of Central Australia, published in serial form in Port Adelaide News and Lefevre's Peninsula Advertiser (SA), Chapter XV, http://gutenberg.net.au/ebooks16/1600641.txt She had travelled with her father as far as the Springs, and both of them were in utter ignorance of the fate which had overtaken the young medico during the journey.
- He has been an Army medico since the Spanish War, active student of X-ray leprosy treatments and degassing processes.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。