ofici-ar: (intr., eccl.) to officiate: perform divine service; -anta, -anto: officiating (priest or clergyman); -o: office (divine service); -ala: relating to divine service (cf. oficala). — EFIS
oficir-o: (milit. nav., of an order) officer (cf. ofic-isto); sub- -o: subordinate officer, non-commissioned officer. — DEFIRS
ofikleid-o: (mus. instr.) ophicleide. — DEFIS
ofit-o: ophite, green porphyry, serpentine. — DEF
ofr-ar: (tr.) to offer, proffer, tender (ulo ad ulu), to offer (to do); to place at the service of (ulu); -ar su: to offer, propose (oneself); -o: offering (act), offer, tender, proposal, bid; -ajo: what is offered; -o:(polit. econ.) supply: what is offered; Ex.: Ofrar helpo, sua brakio a siorino, sua manuo ad amiko, viktimo en sakrifiko, acompanar ulu. La lego di l’ofro e di la demando determinas la preco di la vari sur ula merkato. V. exp.: Il propozis a me irar kun il en la teatro, ma il ne ofris a me plaso. On povas ofrar la vari sen prizentar li: en la komercal borso, on ne prizentas la vari ipsa, same kam en la financal borso en ne prizentas la valori: tamen on ofras li; II-79, 167. — DEFIS
ofset-o: (2001) offset (printing method). — DEFIS
oft-e: oft, often, oftentimes; -a: frequent; maxim ofte: most often, very often; ne- -e: rarely, seldom. Ex.: Ofte on mustas facar ulo quon on ne deziras facar. V. exp.: Ofta ne esas sinonima a frequa. Oftadicesas pri ulo quo eventas «ofte», t.e. multa foyi en ula intervalo. Frequa esas utila en tekniko: ex. on bezonas parolar pri flui (elektrala) di granda frequeso: on ne povas dicar: di granda ofteso: to semblus signifikar, ke on uzas li ofte; IV-237. Ant.: rara. — DE
oftalmi-o: ophthalmia. — DEFIS
oftalmologi-o: ophthalmology.
oftalmoskop-o: ophthalmoscope.
ogiv-o: (arch.) ogive. — DEFIS
ogl-ar: (tr.) to ogle: view with side glances; to cast glances at slyly; -achar: to leer at (ulu). — E
ogr-(ul)o: ogre. — DEFIS
«ohm»: (elec.) ohm.
-oid-: (scient., suffix) having the same form as.
ok: eight; -esma: (ordinal) eighth; -opla, -oplo: eight-fold, octuple; -imo: one-eighth; -a-dek: eighty, fourscore; -a-dek-yar-a, -o: octogenarian; -ima negro: octoroon: person one-eighth black; (cf. du). — EFIS
okapi-o: (2001) okapi: an African mammal (Okapia johnstoni) related to a giraffe. — DEFIRS
okarin-o: (mus. instr.) ocarina. — DEF
okazion-o: occasion, opportunity; -e: occasionally, at times; -e di: apropos (of); (cf. kauzo). Ex.: Me kaptis la okaziono por parolar ad il. Kande okaziono prizentos su, ni iros. — EFIRS
okr-o: ochre; reda -o: red ochre. — DEFIRS
okta-: (scient. prefix) octo-.
oktaedr-o: (geom.) octahedron. — DEFIS
oktant-o: octant: eighth of a circle; (astron. instr.) octant. — DEFIS
oktav-o: (mus., ch. festival, verse) octave. — DEFIRS
oktilion-o: (English notation) octillion (1,000,000 8 ). — DEFS
oktobr-o: October. — DEFIRS
oktogon-o: (geom.) octagon. — DEFIS
oktopod-o: octopod (having eight legs); order Octopoda; (cf. polpo). — DEFIS
okul-o: eye; -eto: small eye; (tech.) eyelet hole; -ala: ocular; -alo: eye-piece, eye-glass; -isto: oculist; -agar: (tr.) to eye (ulu, ulo); -o nuda: naked eye; -o po -o: eye for eye; -klapo, -shirm-ilo: eye-shade; (for horses) blinker; -o-skrubo: a staple, eyebolt: screw with ringed head. — DEFIRS
okult-a: occult. V. exp.: vid. arkana. — DEFIS
okultac-o: (astron.) occultation; -ar: (tr.) to occult. — DEFIS
okup-ar: (tr.) to occupy (a place, time); -ar su: to occupy oneself, employ oneself, be busy (pri); -esar: to be occupied (da); -eso: occupancy (fact); -(ad)o: occupying; -ant-ajo, -ivo: (that which occupies) business, work, occupation; -anto, -ero: occupant; -ata: occupied, busy. Ex.: La lito okupas la tota spaco. La soldati okupis la urbo. La diskutado okupis la tempo. Ca laboro okupis dek yari di lua vivo. Il okupis su en (od, pri) sua gardeno. Esar sen okupeso. La okupo di la urbo da la trupi. La okup-antajo, -ivo di soldati, di komercisto. — DEFIS