Bad Lands Bad Lands /ˈbæd ˈlændz/

noun

1. An eroded and barren region in southwestern South Dakota and northwestern Nebraska  ( Bad Lands , Badlands , Badlands Wilderness )
   an eroded and barren region in southwestern South Dakota and northwestern Nebraska
   
   

 prophylactic prophylactic /ˌproʊfɪˈlæktɪk/

adjective

1. Preventing or contributing to the prevention of disease  ( preventative , prophylactic , preventive )
   preventing or contributing to the prevention of disease
    Preventive medicine
   preventive medicine
    Vaccines are prophylactic
   vaccines are prophylactic
    A prophylactic drug
   a prophylactic drug
   
2. Warding off  ( cautionary , prophylactic )
   warding off
    The swastika...a very ancient prophylactic symbol occurring among all peoples
   the swastika...a very ancient prophylactic symbol occurring among all peoples
   
3. Capable of preventing conception or impregnation  ( antifertility , contraceptive , prophylactic )
   capable of preventing conception or impregnation
    Contraceptive devices and medications
   contraceptive devices and medications
   

noun

1. Contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse  ( condom , prophylactic , rubber [Informal, N. American] , safe , safety , franger [Informal, Australian] , French letter [Archaic, Informal, British] )
   contraceptive device consisting of a sheath of thin rubber or latex that is worn over the penis during intercourse
    He always uses a condom to prevent sexually transmitted infections and unwanted pregnancy
   He always uses a condom to prevent sexually transmitted infections and unwanted pregnancy
   
   
2. Remedy that prevents or slows the course of an illness or disease  ( preventative , preventive , prophylactic )
   remedy that prevents or slows the course of an illness or disease
    The doctor recommended several preventatives
   the doctor recommended several preventatives
   

 synchroscope synchroscope /ˈsɪŋkrəˌskoʊp/

noun

1. An instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)  ( synchroniser [British] , synchronizer , synchronoscope , synchroscope )
   an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines)
   
   

 legal expert legal expert /ˈliːɡəl ˈɛkspɜːrt/

noun

1. (law) a legal scholar versed in civil law or the law of nations  ( legal expert , jurist )
   (law) a legal scholar versed in civil law or the law of nations