背

halo effect

Chinese box turtle (Cuora flavomarginata)

Caspian gull (Larus cachinnans)

to hunch one's shoulders; to arch one's back

back blow method (for dislodging an obstruction in the windpipe)

Idiomatic expression

to rain on one side only (and leave the other side dry)

Geology

back swamp; back slough; back marsh

Jocular, humorous term

(imaginary) switch on a baby's back that makes it cry as soon as it is put to bed; back switch

Idiomatic expression

to let one's actions do the talking; to lead by example; to walk the talk

background art

to betray one's love

Idiomatic expression

to have a chill run down one's spine

Rare term

back

Rare term

disobeying; infringing; running counter to

Rare term

North Pacific right whale (Eubalaena japonica)

Dated term

back (of the body)

Rare term

horse's back

Rare term

to stray from the path of righteousness

backwater

Archaic

standing with one's back to water (river, lake, etc.)

Female; Said of a husband, lover or close male friend

my love; my dear; darling

Male; Said of a close male friend

my friend; comrade

meat, flesh, or muscles along the spine

wooden rack with shoulder straps for carrying loads on one's back

couple; husband and wife; man and wife

sibling; brother and sister