bachelor's degree

baker's dozen

baker's eczema

baker's yeast

bang's disease

banker's acceptance

banker's bill

banker's check

banker's draft

banti's disease

banti's syndrome

barber's itch

barber's pole

barnaby's thistle

barrow's goldeneye

bartholin's gland

batter's box

bayes' postulate

bayes' theorem

bear's breech

bear's breeches

bear's ear

bear's foot

bear's grape

bear's-paw fern

bedloe's island

beggar's lice

beggar's-ticks

benford's law

bernoulli's law

bewick's swan

binder's board

bird's eye

bird's-eye

bird's-eye bush

bird's-eye maple

bird's eye view

bird's foot

bird's foot clover

bird's-foot fern

bird's foot trefoil

bird's-foot violet

bird's nest

bird's nest fern

bird's-nest fungus

bishop's cap

bishop's hat

bishop's pine

bishop's throne

bleeder's disease

blindman's bluff

blindman's buff

blow one's stack

boatswain's chair

boltzmann's constant

boott's goldenrod

borrower's card

bosin's disease

bo's'n

bos'n

bo'sun

bosun's chair

bowman's capsule

boyle's law

bradley's spleenwort

bramley's seedling

braun's holly fern

break one's back

break someone's heart

breed's hill

brewer's mole

brewer's mountain heather

brewer's spruce

brewer's yeast

bricklayer's hammer

bride's bonnet

bright's disease

broca's aphasia