Words in english starting with O that are validated

• Ophioglossum — Noun – English ～ the type genus of the fern family Ophioglossaceae
• ophiolatry — Noun – English ～ the worship of snakes
• Ophiophagus hannah — Noun – English ～ large cobra of southeastern Asia and the East Indies; the largest venomous snake; sometimes placed in genus Naja
• Ophiophagus — Noun – English ～ king cobra
• Ophisaurus — Noun – English ～ glass lizards
• ophiuchus — Noun – English ～ a large constellation in the equatorial region between Hercules and Scorpius
• Ophiurida — Noun – English ～ brittle stars
• ophiuroidea — Noun – English ～ brittle stars and basket stars
• ophryon — Noun – English ～ the craniometric point in the midline of the forehead immediately above the orbits
• Ophrys insectifera — Noun – English ～ European orchid whose flowers resemble flies
• Ophrys apifera — Noun – English ～ European orchid whose flowers resemble bumble bees in shape and color
• Ophrys muscifera — Noun – English ～ European orchid whose flowers resemble flies
• Ophrys — Noun – English ～ a hardy genus of terrestrial orchids of Europe and northern Africa and western Asia
• ophthalmectomy — Noun – English ～ surgical removal of an eye
• ophthalmia — Noun – English ～ severe conjunctivitis
• ophthalmia neonatorum — Noun – English ～ ophthalmia in newborns; contracted while passing through the birth canal; usually prevented with silver nitrate drops
• ophthalmic artery — Noun – English ～ a branch of the internal carotid artery that supplies the eye and neighboring structures
• ophthalmic — Adjective – English ～ of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"; "ophthalmic defect"
• ophthalmic — Adjective – English ～ of or relating to ophthalmology; "ophthalmic surgery"
• ophthalmitis — Noun – English ～ severe conjunctivitis

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