ben·zo·di·az·e·pine 
(bĕn′zō-dī-ăzə-pēn′, -pĭn)
(bĕn′zō-dī-ăzə-pēn′, -pĭn)n.
Any of a group of chemical compounds with a common molecular structure and similar pharmacological effects, used as antianxiety agents, muscle relaxants, sedatives, hypnotics, and sometimes as anticonvulsants.
[BENZO- + diazepine, seven-member ring containing two nitrogens (DI- + AZ(O)- + (H)EP(TA)- + -INE2).]