A house with two units sharing a common wall.

synonyms: duplex house, semidetached house.

Roget 423: luminary; light etc. 420; flame etc. (fire) 382.    spark, scintilla; phosphorescence, fluorescence.    sun, orb of day, Phoebus, Apollo^†, Aurora; star, orb; meteor, falling star, shooting star; blazing star, dog star, Sirius; canicula, Aldebaran^†; constellation, galaxy; zodiacal light; anthelion^†; day star, morning star; Lucifer; mock sun, parhelion; phosphor, phosphorus; sun dog^†; Venus.    aurora, polar lights; northern lights, aurora borealis; southern lights, aurora australis.    lightning; chain lightning, fork lightning, sheet lightning, summer lightning; ball lightning, kugelblitz [G.]; [chemical substances giving off light without burning] phosphorus, yellow phosphorus; scintillator, phosphor; firefly luminescence.    ignis fatuus [Lat.]; Jack o'lantern, Friar's lantern; will-o'-the-wisp, firedrake^†, Fata Morgana [Lat.]; Saint Elmo's fire.    [luminous insects] glowworm, firefly, June bug, lightning bug.    [luminous fish] anglerfish.    [Artificial light] gas; gas light, lime light, lantern, lanthorn^†; dark lantern, bull's-eye; candle, bougie [Fr.], taper, rushlight; oil etc. (grease) 356; wick, burner; Argand^†, moderator, duplex; torch, flambeau, link, brand; gaselier^†, chandelier, electrolier^†, candelabrum, candelabra, girandole^†, sconce, luster, candlestick.    [non-combustion based light sources] lamp, light; incandescent lamp, tungsten bulb, light bulb; flashlight, torch [Brit.]; arc light; laser; [microwave radiation]; maser neon bulb, neon sign; fluorescent lamp.    [parts of a light bulb] filament; socket; contacts; filler gas.    firework, fizgig^†; pyrotechnics; rocket, lighthouse etc. (signal) 550.    ... show more

An apartment having rooms on two floors that are connected by a staircase.

synonym: duplex apartment.

Change into a duplex.

used technically of a device or process Having two parts.

Roget 89: two, twin; dual, dualistic, double; binary, binomial; twin, biparous^†; dyadic [Math.]; conduplicate^†; duplex etc. 90; biduous^†, binate^†, diphyletic^†, dispermic^†, unijugate^†; tete-a-tete.    coupled etc. v.; conjugate.    both, both the one and the other.    ... show more

Roget 90: double; doubled etc. v.; bicipital^†, bicephalous^†, bidental^†, bilabiate, bivalve, bivalvular^†, bifold^†, biform^†, bilateral; bifarious^†, bifacial^†; twofold, two-sided; disomatous^†; duplex; double-faced, double-headed; twin, duplicate, ingeminate^†; second.    ... show more

Allowing communication in opposite directions simultaneously.