Definition of unicameral in English:
 unicameral
adjectiveˌjuːnɪˈkam(ə)r(ə)lˌjunəˈkæm(ə)rəl
(of a legislative body) having a single legislative chamber.
 primary legislative authority is exercised through the unicameral Chamber of Deputies
 the constitutional changes also provided for the legislature to become unicameral
 Example sentencesExamples
-  She has since been re-elected to the Seimas (Lithuania's unicameral legislative body) as a member of the Women's Party.
 -  The Croatian Parliament, also known as the Sabor, became a unicameral body after its Upper House (Chamber of Counties) was eliminated by constitutional amendment in March 2001.
 -  The highest legislative body is a unicameral parliament called the State Great Hural with 76 elected members.
 -  Since independence in 1966, Botswana has been a multiparty democracy with elections held every five years to a unicameral legislature, the National Assembly, which has been dominated by the Botswana Democratic Party.
 -  The legislative branch is the unicameral National Assembly, which has 121 members elected by popular vote to serve five-year terms.
 
Origin
  
Mid 19th century: from uni- 'one' + Latin camera 'chamber' + -al.
   Definition of unicameral in US English:
 unicameral
adjectiveˌyo͞onəˈkam(ə)rəlˌjunəˈkæm(ə)rəl
(of a legislative body) having a single legislative chamber.
 primary legislative authority is exercised through the unicameral Chamber of Deputies
 the constitutional changes also provided for the legislature to become unicameral
 Example sentencesExamples
-  The legislative branch is the unicameral National Assembly, which has 121 members elected by popular vote to serve five-year terms.
 -  Since independence in 1966, Botswana has been a multiparty democracy with elections held every five years to a unicameral legislature, the National Assembly, which has been dominated by the Botswana Democratic Party.
 -  The Croatian Parliament, also known as the Sabor, became a unicameral body after its Upper House (Chamber of Counties) was eliminated by constitutional amendment in March 2001.
 -  She has since been re-elected to the Seimas (Lithuania's unicameral legislative body) as a member of the Women's Party.
 -  The highest legislative body is a unicameral parliament called the State Great Hural with 76 elected members.
 
Origin
  
Mid 19th century: from uni- ‘one’ + Latin camera ‘chamber’ + -al.