Definities van Vivat's Geïllustreerde Encyclopedie in de Ensie O
- Ossia
- Ossificatie
- Ossip iwanowitsch senkowski
- Ossip schubin
- Ossip wladomiriwitsj gurko
- Ossmanstedt
- Ossolinski
- Ossuna
- Ostade
- Ostalgie
- Ostara
- Ostasjkow
- Ostealgie
- Osteïtis
- Ostende
- Ostensibel
- Ostensie
- Ostensorium
- Ostentatie
- Osteoblasten
- Osteocarcinoma
- Osteoclasie
- Osteogangreen
- Osteogenese
- Osteoïd
- Osteologie
- Osteomalacie
- Osteometrie
- Osteomyelitis
- Osteopathologie
- Ostëoplastiek
- Osteopsathyrose
- Osteosarcoom
- Osteosclerose
- Osteotomie
- Oster
- Osterath
- Osterfeld
- Osterman-tolstoi
- Osternburg
- Osterode
- Osterwald
- Ostiaken
- Ostiarius
- Ostiglia
- Ostinato
- Ostitis
- Ostium
- Ostjakeil
- Ostra
- Ostracea
- Ostracodas
- Ostrau
- Ostritz
- Ostrog
- Ostrog (geslacht)
- Ostrogoshsk
- Ostrogothen
- Ostrolenka
- Ostrow
- Ostrowo
- Ostuni
- Osuna
- Oswald achenbach
- Oswald heer
- Oswald marbach
- Oswald myconius
- Oswald ottendorfer
- Oswald schmiedeberg
- Oswald van wolkenstein
- Oswald von richthofen
- Oswalütwistle
- Oswego
- Oswestry
- Osymandyas
- Otacilius crassus
- Otaheiti
- Otalgie
- Otaria
- Otavie
- Oterdum
- Oterleek
- Otfried
- Otfried mylius
- Othello
- Othman
- Othniel charles marsh
- Othomi
- Othoniel
- Othryades
- Othrys
- Otiater
- Otitis
- Otjimbingue
- Otley
- Otocac
- Otolithen
- Otomaken
- Otomi
- Otomycosis