1. Not to be exceeded
   "unsurpassable skill"; "unsurpassable standards of workmanship"

See also: best

• biosafety level 1
• biosafety level 2
• biosafety level 3
• biosafety level 4
• bioscience
• bioscope
• biosecurity
• biosphere
• biostatistics
• biosynthesis
• biosynthetic
• biosystematic
• biosystematics
• biosystematy
• biota
• biotech
• biotechnological
• biotechnology
• bioterrorism
• biotic
• biotic community
• biotin
• biotite
• biotitic
• biotope