See Also: Parks, Rosa(encyclopedia)
Parks, Rosa(dictionary)
Parks, Gordon(encyclopedia)
Palaces and Parks of Potsdam and Berlin(tourism)
Lake Turkana National Parks(tourism)
Ischigualasto-Talampaya Natural Parks(tourism)
Canadian Rocky Mountain Parks(tourism)
Nanda Devi and Valley of Flowers National Parks(tourism)
Rosa(medicine)
sub rosa(dictionary)

pyrimidine (sh) and Parks, Rosa (oh)


pyrimidine (sh)




Any of a class of heterocyclic compounds with a ring structure of four carbon and two nitrogen atoms.

The simplest member, pyrimidine itself (C4H4N2), is not common, but Derivatives with the structure are. Examples include thiamine (vitamin B1), several sulfa drugs, barbiturates, and three of the bases in nucleic acids (cytosine, thymine, and uracil).


Parks, Rosa (oh)



(1913- ) a black woman in the US who became famous in 1955 because she refused to give her seat on a bus to a white man. This action was illegal in the US state of Alabama and she was arrested by the police. As a result, Martin Luther King persuaded people not to use these buses, and in 1956 the US Supreme Court said that segregation (=keeping black people separate from white people) on buses was not legal.