rokambol-o*: (bot.) rocambole (Allium sativum, var. Ophioscorodon). — DEF
rokok-a, -o: rococo (style); (fig.) antiquated (style). — DEF.
rol-o: (theat. and gen.) rôle: part, character, impersonation; plear -o: to play a part; -eto: minor rôle. — DEFR
roler-o*: (tech.) roller (cf. rul-ilo, -bloko).
Rom-ano: Roman citizen; -ana balanco: Roman balance, a steelyard; la -ana lingui: the Romance languages.
roman-o: a novel, book of fiction; -isto, autoro: novelist, romance writer; -ala: relating to a novel; -atra, -ema: fanciful, romantic; -protagonisto: hero of romance; (cf. novelo). — DeFIRS
romanc-o: ballas, romantic song. — DFIRS
(la) Romanch-a (linguo): Romansh (language). Def.: Linguo romanala parolata en Graubünden: Suisa kantono maxim estala; V-89. — DEF
romantik-a: romamtic. — DEFIRS
romb-o: (geom.) rhomb(us); -ala: rhombic. — DEF
romboedr-o*: (geom.) rhombohedron, parallelepipedon. — DEF
romboid-o*: (geom.) rhomboid. — DEFIS
rond-a: round, rotund; -o, -ajo: any round figure or object (cf. cirklo, disko, ringo); -eta, atra: roundish, rotund, round-like; -eso: roundness, rotundity; -igar, -eskar: (tr., intr.) to make, become round; -irar: (intr.) to go around, circulate; -iro: round, circuit; (of a policeman, etc.) beat. — DEFIS
rondel-o: (poetry) rondeau, roundelay; (mus.) rondo. — DeFIRS
ronk-ar: (intr.) to snore. — FS
ronron-ar*: (intr., of cats) to purr. — F
roqu-ar: (intr.) to rook, castle (at chess). — F
ros-o: dew; -oza: covered with dew; bedewed. — FRS
rosbif-o: roast-beef. — DEFIRS
rosmar-o*: walrus (genus: Rosmarus). — L
rosmarin-o*: (bot.) rosemary (genus: Rosmarinus). — DEFIR
rosp-o: toad. — I
rost-ar: (tr., intr.) to roast (meat); to toast (bread); -ajo, -karno: a roast; -o-pano: toast. — DEFI
rostr-o: (in gen.) any beak-like extension; (nat. hist.) bill, beak (of an insect); trunk, proboscis (as of an elephant); (bot) prolonged rigid process; (Roman antiq.) beak of a ship; rostrum in a forum.
rot-o: wheel; -aro: wheels (collect.), wheel-works, -movement; -o-sulko: rut; quar-rota veturo: four-wheeled vehicle; -o-nabo: hub, nave; -o-felgo: felloe, felly, rim; -o-torment-ar: to break (on a wheel); -atre marchar: to go heels over head; -eskarto: (R.R.) gauge: distance between the wheels. — FIS
rotac-ar: (intr.) to rotate, revolve: turn on axis; -(ad)o: rotating, rotation; -a, -ala: rotary; -o-kubo: teetotum, spinning top. Ex.: La planeti rotacas cirkum sua axi; li jiras cirkum la suno. Rotacado di roto. V. exp.: vid. jirar. — DEFIRS
rotan-o: (bot.) rattan (Calamus rotang); -a stulo: rattan chair. — DeFRS
rotifer-o: (zool.) rotifer. — EFIS
rotol-ar: (intr.) to rumble, roll (with noise). Ex.: Veturo rotolas kande ol rulas alonge la strado. La rotolado di tondro, di tamburo. V. exp.: L’ideo expresenda esas ta di bruiso produktata per frapi rapide sucedanta; V-493. — I
rotond-o: (arch.) rotunda; (clothing) a round cloak. — DEFIRS
rotul-o: (mechan.) ball and socket joint. — FIS
rov-o: (bot.) bramble, brier, thorn-bush; -eyo: brake, brier-patch; -bero: a brier berry; blackberry. — I
rovr-o: (bot.) English oak (Quercus robur); (cf. querko). — FIS
royal-ism-o: royalism: attachment to the cause of royalty; -ist-a, -o: royalist. — DEFR
roz-o: rose; -oza: full of roses; -atr-ajo: rosette; -iero: r. bush; -ier-eyo: r. garden; -ea: r. colo(u)red; -koloro: r. colo(u)r; -aquo: r. water; -buketo: bouquet of r.s; -burjono: r. bud; -fenestro: (arch.) r. window; -ligno: rosewood; -mielo: honey of r.s; vento -o: (mariner’s) compass-card. — DEFIRS
rozari-o: (rel.) rosary. — DEFIS
rozeol-o: (med.) roseola, a rose colo(u)red rash; scarlet rash, rose rash; (cf. morbilo). — EFIS
rozlaur-o: (bot.) oleander, rose-bay (Nerium Oleander).
ruband-o: ribbon; tape; -izar: to trim with ribbons. — eF
rubarb-o: (bot.) rhubarb (genus: Rheum). — DEFIS
rubi-o: (bot.) madder (Rubia tinctorum). —ISL
rubid-o*: (chem.) rubidium.
rubin-o: (stone) ruby; -ea: ruby-colo(u)red; balas- -o: balas-ruby. — DeFIRS
rubrik-o: rubric. V. exp.: Rubriko esas generala titulo. Ex. en Progreso esas: la Lingual questioni, Kroniko, Bibliografio, Diversaji, sub qui singla artiklo havas sua titulo; VII-412. — DEFIS
rud-a: rude, (of things) rough, unformed by art; (of persons) rough, uncultured, uneducated; (of manners) coarse, unpolished; -eso: roughness, rudeness; traktar -e: to use roughly, harshly, to ill-treat. — DEFI
rudiment-a: rudiment-al, -ary: little developed; -o: rudiment, element. Ex.: Rudimenta organo. Rudimenti di gramatiko. La rudimenti di planti. — DEFIRS
ruf-a: russet, sandy, reddish-brown, -yellow; ginger-colo(u)red; -(ul)o: red-haired, sandy-haired person; -eso: russet-colo(u)r; -atra: reddish, russet; -igar, -eskar: (tr., intr.) to make, become russet-colo(u)red, brown. Ex.: La tro varma glatigilo povas rufigar la linjo. — L