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3. cell-free

adjective. lacking cells.

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4. secondary

adjective. ['ˈsɛkənˌdɛri'] not of major importance.

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5. secondary

adjective. ['ˈsɛkənˌdɛri'] depending on or incidental to what is original or primary.

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6. secondary

adjective. ['ˈsɛkənˌdɛri'] belonging to a lower class or rank.

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8. cell

noun. ['ˈsɛl'] any small compartment.

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