Birefringence

Birth control

Bismuth

Bison

Bit

Bitumen

Bivalve, rudist

Bivalvia

Black hole

Black pepper

Black Sea

Black shale

Black widow pulsars

Black-hole thermodynamics and superstring theory

Blackberry

Blackbody

Blackleg

Blackout prevention

Blastoidea

Blastulation

Blattodea

Bleaching

Blimp

Bloch theorem

Block and tackle

Block diagram

Blood

Blood group

Blood group genotyping

Blood vessel

Blowout coil

Blowpipe

Blue lasers

Blue stain in wood

Blue straggler star

Blueberry

Bluefish

Bluegrass

Blueschist

Bluestem grass

Bluetongue

Boat propulsion

Body area networks for health care

Body dysmorphic disorder

Body self-perception

Bog

Bohrium

Boiler

Boiler economizer

Boiler feedwater

Boiler feedwater regulation

Boiling

Boiling point

Boiling processes

Bolometer

Bolt

Bolted joint

Boltzmann constant

Boltzmann statistics

Boltzmann transport equation

Bond angle and distance

Bonding

Bone

Bone disorders

Bonobo genome

Bonsai

Book manufacture

Boolean algebra

Bootes

Boracite

Borane

Borate mineral

Bordetella

Boring bivalves

Boron

Borrelia

Bose-Einstein condensation

Bose-Einstein statistics

Botanical garden

Botany

Botulism

Boundary-layer flow

Bovine viral diarrhea

Boyle's law

Brachiopoda

Brain

Brake

Branch circuit

Branched polymer

Branchiobdellida

Branchiopoda

Branchiura

Brand security in packaging

Brass

Brassinosteroids

Brayton cycle

Brazil nut

Brazing

Breadboarding

Breadfruit