A furnace or establishment for burning (cremating) corpses.
Crematoria is a noun.
no
According to the German Wikipedia, in November 1944 the SS began dismantling the crematoria in the hope of reassembling them in Mauthausen. Shortly before the arrival of the Soviet Army in Auschwitz (27 January 1945) the SS blew up the gas chambers and the remaining crematoria - and then fled.
Please see the link below, which should answer the question as far as Auschwitz is concerned. Most of the larger concentration camps, such as Buchenwald and Dachau, also had crematoria, but they were smaller.
The crematoria were made by J. A. Topf und Soehne (Erfurt). The firm had a reputation for manufacturing efficient crematoria that used low grade fue.
Crematoria and pits.
The crematoria did not kill people; people were killed in the gas chambers, then the corpses were cremated in the crematoria.
Gas chambers and crematoria.
Yes, the crematoria (crematories) were for burning corpses.
No. The "ovens", properly called crematoria, were used after the Jews were already dead from being gassed in the gas chambers. The purpose of the crematoria was to turn the Jewish bodies into ashes and, therefore, make disposal easier.
The corpses were burned in crematoria.
In the context of the Holocaust, fiery furnaces refers to the crematoria (used to burn the victims' corpses).