1. Not capable of being obtained
   "timber is virtually unobtainable in the islands"
   - inaccessible, unprocurable, untouchable

See also: unavailable

• family Belonidae
• family Belostomatidae
• family Bennettitaceae
• family Berberidaceae
• family Betulaceae
• family Bible
• family Bignoniaceae
• family Bittacidae
• family Blastodiaceae
• family Blattidae
• family Blechnaceae
• family Blenniidae
• family Boidae
• family Boletaceae
• family Bombacaceae
• family Bombycidae
• family Bombycillidae
• family Bombyliidae
• family Boraginaceae
• family Bothidae
• family Bovidae
• family Bradypodidae
• family Bramidae
• family Branchiobdellidae
• family Branchiostegidae