medicine  
noun uk/ˈmed.ɪ.sən/ /ˈmed.sən/ us/ˈmed.ɪ.sən/
  (TREATMENT)      
 B1 [ U ]医术;医学 
treatment for illness or injury, or the study of this
  paediatric/preventative medicine 儿科/预防医学 
 orthodox/Western medicine 正统/西方医学 
 a career in medicine 从医生涯 
 She is a doctor, but is unable to practise medicine (= work as a doctor) in her own country. 她是位医生,却不能在自己的国家行医。 
 - More examples
 - She is a cancer sufferer who has rejected orthodox medicine and turned instead to acupuncture, aromatherapy and other forms of alternative medicine.
 - Elizabeth Quan is a London-based practitioner of traditional Chinese medicine.
 - She specializes in paediatric medicine.
 - The number of practising doctors is falling even though more people are qualifying in medicine.
 - Penicillin produced a revolution in medicine.
 
  (SUBSTANCE)      
A2 [ C or U ]药,药物,药剂 
a substance, especially in the form of a liquid or a pill, that is a treatment for illness or injury
  cough medicine 止咳药 
 Take two spoonfuls of medicine at mealtimes. 进餐时服两勺药。 
 She knows a lot about herbal medicines. 她懂得许多关于草药的知识。 
 - More examples
 - This medicine is for external use only and should not be taken internally.
 - Is this medicine safe for children?
 - The little boy was stamping his foot and refusing to take his medicine.
 - The trucks were laden with food and medicine.
 - This drug can be safely used in combination with other medicines.
 
Idiom  
give someone a dose/taste of their own medicineidiom  对(某人)以牙还牙
to treat someone as badly as they have treated you