jpdb beta

double torture; double pain; double hardship; double whammy

double circle (indicating "very good" on a piece of school work)

dual personality; split personality

twofold and threefold; doubled and redoubled

double agent

dual structure; double structure

instrumental duet; instrumental duo

double helix (structure of DNA)

double life

double exposure

duality; dual nature; duplexity; two-fold character

double chin

double negative

double-glazed window; double window; storm window

someone with a dual personality

double star; visual double

(illegal) dual bookkeeping; two sets of books

dual nationality; dual citizenship

duplication; redundancy

double glazing; double-paned glass

double-jointed

double bind

double-slit experiment

dual monarchy; Austria-Hungary; Austro-Hungarian Empire

double weave; double cloth

bigamy

double standard

double quotes

double-booking

redundant keigo (i.e. improper use of the -rareru honorific form together with an honorific verb such as ossharu)

dual diplomacy

double printing; superimposition; superimposing

diphthong

double exposure

double bond

two prices (for the same product); dual pricing

second mortgage

double glazing

double collision

double standard

managing data from two locations; dual control; dual custody

double jeopardy; double punishment; double penalty

full duplex; FDX

double exposure

bifocal

double duty

double standard of morality

half duplex; HDX

double taxation

dual ring

dual attachment concentrator

dual attachment station

duplex

double volcano

double jeopardy

double electron capture

double standard

issuing (the same receipt) twice; issuing duplicate (receipts)

digraph

double disaster

double factorial

deuterium; heavy hydrogen