List of Words for Letter ‘O’
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opaque Completely blocking light from passing through.
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orbit The path an object takes as it travels around another object.
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organ A group of tissues that work together to do a certain job.
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organism A living thing that carries out basic life functions on its own.
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organ system A group of organs that work together to carry out a life function.
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outer core liquid layer below Earth’s mantle.
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ovary A structure containing egg cells.
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oxygen A gas found in air and water that most plants and animals need to live.