| pentobarbital sodium | (n) a barbiturate (trade name Nembutal) used as a sedative and hypnotic and antispasmodic, Syn. yellow jacket, Nembutal, pentobarbital |
| thiopental | (n) barbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidly; induces a relaxed state when injected as a general anesthetic, Syn. thiopental sodium, Pentothal, thiopentobarbital sodium |