Nouns in english starting with O

• one thousand million — Noun – English ～ the number that is represented as a one followed by 9 zeros
• one thousand — Noun – English ～ the cardinal number that is the product of 10 and 100
• one-hundred-thousandth — Noun – English ～ one part in a hundred thousand equal parts
• one-ten-thousandth — Noun – English ～ one part in ten thousand equal parts
• one-thousandth — Noun – English ～ one part in a thousand equal parts
• onion thrips — Noun – English ～ injurious to onion plants and sometimes tobacco
• order Thymelaeales — Noun – English ～ Myrtaceae; Combretaceae; Elaeagnaceae; Haloragidaceae; Melastomaceae; Lecythidaceae; Lythraceae; Rhizophoraceae; Onagraceae; Lecythidaceae; Punicaceae
• Ornithogalum thyrsoides — Noun – English ～ South African perennial with long-lasting spikes of white blossoms that are shipped in to Europe and America for use as winter cut flowers
• order Thysanoptera — Noun – English ～ thrips
• order Thysanura — Noun – English ～ firebrats; silverfish; machilids
• old school tie — Noun – English ～ necktie indicating the school the wearer attended
• old-timer — Noun – English ～ an elderly man
• old-timer — Noun – English ～ an experienced person who has been through many battles; someone who has given long service
• old times — Noun – English ～ past times remembered with nostalgia
• order Tinamiformes — Noun – English ～ coextensive with the family Tinamidae
• osseous tissue — Noun – English ～ the porous calcified substance from which bones are made
• output-to-input ratio — Noun – English ～ the output power of a transducer divided by the input power
• obstetrical toad — Noun – English ～ European toad whose male carries the fertilized eggs wrapped around its hind legs until they hatch
• old-field toadflax — Noun – English ～ North American plant having racemes of blue-violet flowers
• orange toast — Noun – English ～ buttered toast with sugar and grated orange rind and a little orange juice

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