¦brōmō(ˌ)dē¦äksēˌ noun
Etymology: brom- + deoxy- + uridine
: a mutagenic analogue C 9 H 11 O 5 NBr of thymidine that induces chromosomal breakage especially in heterochromatic regions and has been used to selectively destroy actively dividing cells; 5-bromodeoxyuridine — abbreviation BUdR