third rail third rail /θɜrd reɪl/

noun

1. A rail through which electric current is supplied to an electric locomotive  ( third rail )
   a rail through which electric current is supplied to an electric locomotive
    The subway system relies on the third rail to power the trains.
   The subway system relies on the third rail to power the trains.
   
   

 random access memory random access memory /ˈrændəm ˈækses ˈmɛməri/

noun

1. The most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible  ( random access memory , read/write memory , RAM , random memory , random-access memory )
   the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible
    My computer has 16GB of RAM, which is enough for my needs
   My computer has 16GB of RAM, which is enough for my needs
   
   

 Big Blue Big Blue /bɪɡ bluː/

noun

1. A reliable and deadly 15,000-pound fragmentation bomb that explodes just above ground with a large radius; the largest conventional bomb in existence; used in Afghanistan  ( Big Blue , BLU-82 )
   a reliable and deadly 15,000-pound fragmentation bomb that explodes just above ground with a large radius; the largest conventional bomb in existence; used in Afghanistan
   
   

 hypertrophy hypertrophy /ˈhaɪpɝˌtroʊfi/

noun

1. () Abnormal enlargement of a body part or organ  ( hypertrophy )
   abnormal enlargement of a body part or organ
    The bodybuilder's hypertrophy was evident in his enlarged muscles.
   The bodybuilder's hypertrophy was evident in his enlarged muscles.
   
   

verb

1. Undergo hypertrophy  ( hypertrophy )
   undergo hypertrophy
    Muscles can hypertrophy when people take steroids
   muscles can hypertrophy when people take steroids