opisthognathous
— Adjective
– English
～ having receding jaws
opisthorchiasis
— Noun
– English
～ infestation with flukes obtained from eating raw fish; common in eastern Asia
opisthotonos
— Noun
– English
～ severe spasm in which the back arches and the head bends back and heels flex toward the back
opium
— Noun
– English
～ an addictive narcotic extracted from seed capsules of the opium poppy
opium den
— Noun
– English
～ a building where opium is sold and used
opium addict
— Noun
– English
～ someone addicted to opium
opopanax
— Noun
– English
～ an odorous gum resin formerly used in medicines
oporto
— Noun
– English
～ port city in northwest Portugal; noted for port wine
opossum
— Noun
– English
～ small furry Australian arboreal marsupials having long usually prehensile tails
opossum
— Noun
– English
～ nocturnal arboreal marsupial having a naked prehensile tail found from southern North America to northern South America
oppenheimer
— Noun
– English
～ United States physicist who directed the project at Los Alamos that developed the first atomic bomb (1904-1967)
opponent
— Noun
– English
～ a contestant that you are matched against
opponent
— Noun
– English
～ someone who offers opposition
opponent
— Adjective
– English
～ characterized by active hostility; "opponent (or opposing) armies"
opportune
— Adjective
– English
～ suitable or at a time that is suitable or advantageous especially for a particular purpose; "an opportune place to make camp"; "an opportune arrival"; "an opportune time to receive guests"
opportunely
— Adverb
– English
～ at an opportune time; "he arrived rather opportunely just when we needed a new butler"