cryogenics cryogenics /ˈkraɪəˌdʒɛnɪks/

noun

1. The branch of physics that studies the phenomena that occur at very low temperatures  ( cryogenics , cryogeny )
   the branch of physics that studies the phenomena that occur at very low temperatures
   
   

 military engineer military engineer /ˈmɪlɪˌtɛri ɛnˈdʒɪnɪər/

noun

1. (military) a member of the military who is trained in engineering and construction work  ( army engineer , military engineer )
   (military) a member of the military who is trained in engineering and construction work
   
   

 gunny sack gunny sack /ˈgʌni sæk/

noun

1. [ N. American] A bag made of burlap  ( burlap bag [ N. American] , gunny sack [ N. American] , gunnysack [ N. American] )
   a bag made of burlap
   
   

 rut rut /ˈrʌt/

noun

1. () A settled and monotonous routine that is hard to escape  ( groove , rut )
   a settled and monotonous routine that is hard to escape
    They fell into a conversational rut
   they fell into a conversational rut
   
2. () A groove or furrow (especially one in soft earth caused by wheels)  ( rut )
   a groove or furrow (especially one in soft earth caused by wheels)
     The muddy road was filled with deep ruts from the passing vehicles.
   The muddy road was filled with deep ruts from the passing vehicles.
   
   
3. Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity  ( estrus [ N. American] , oestrus [British] , rut , heat )
   applies to nonhuman mammals: a state or period of heightened sexual arousal and activity
   
   

verb

1. Hollow out in the form of a furrow or groove  ( groove , rut , furrow )
   hollow out in the form of a furrow or groove
    Furrow soil
   furrow soil
   
2. Be in a state of sexual excitement; of male mammals  ( rut )
   be in a state of sexual excitement; of male mammals