transcription, транскрипция: [ -ˈpȯr-fə-rən ]
noun
Etymology: International Scientific Vocabulary
Date: 1885
: any of several isomeric porphyrins C 34 H 38 O 6 N 4 that are hydrated derivatives of protoporphyrins ; especially : the deep red crystalline pigment obtained by treating hematin or heme with acid