transcription, транскрипция: [ -ˈbē-ˈtwelv ]
noun
Date: 1948
1. : a complex cobalt-containing compound C 63 H 88 CoN 14 O 14 P that occurs especially in liver, is essential to normal blood formation, neural function, and growth, and is used especially in treating pernicious and related anemias and in animal feed as a growth factor — called also cyanocobalamin
2. : any of several compounds similar to vitamin B 12 in action but having different chemistry