substance abuser substance abuser /ˈsʌbstəns əˈbjuːzər/

noun

1. A person who takes drugs  ( drug user , substance abuser , user )
   a person who takes drugs
   
   

 cytochrome cytochrome /ˈsaɪtəkroʊm/

noun

1. (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)  ( cytochrome )
   (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration)
    Cytochromes play a pivotal role in cellular respiration, aiding in electron transfer.
   Cytochromes play a pivotal role in cellular respiration, aiding in electron transfer.
   
   

 astragalus astragalus /əˈstræɡələs/

noun

1. The bone in the ankle that articulates with the leg bones to form the ankle joint  ( anklebone , astragal , astragalus , talus )
   the bone in the ankle that articulates with the leg bones to form the ankle joint
   
   

 Astragalus

1. Large genus of annual or perennial herbs or shrubs of north temperate regions; largest genus in the family Leguminosae  ( Astragalus , genus Astragalus )
   large genus of annual or perennial herbs or shrubs of north temperate regions; largest genus in the family Leguminosae
   

 hansom cab hansom cab /ˈhænsəm kæb/

noun

1. A two-wheeled horse-drawn covered carriage with the driver's seat above and behind the passengers  ( hansom , hansom cab )
   a two-wheeled horse-drawn covered carriage with the driver's seat above and behind the passengers