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    constant

    US /ˈkɑnstənt/

    UK /'kɒnstənt/

    • Adjective
    • Happening frequently or without pause
    • Remaining the same over time or not changing.
    • Noun
    • Thing that happens always or at a regular rate
    • A physical quantity that is believed to have a fixed value and is used in calculations.
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    progress

    US /ˈprɑɡˌrɛs, -rəs, ˈproˌɡrɛs/

    UK /'prəʊɡres/

    • Verb (Transitive/Intransitive)
    • To move forward or toward a place or goal
    • To make progress; develop or improve.
    • Uncountable Noun
    • Act of moving forward
    • The process of improving or developing something over a period of time.
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    scale

    US /skel/

    UK /skeɪl/

    • Noun (Countable/Uncountable)
    • Size, level, or amount when compared
    • Small hard plates that cover the body of fish
    • Verb (Transitive/Intransitive)
    • To change the size of but keep the proportions
    • To climb something large (e.g. a mountain)
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    cortex

    US /ˈkɔrˌteks/

    UK /'kɔ:teks/

    • Noun (Countable/Uncountable)
    • The outer part of an organ/structure, e.g. brain
    • The outer layer of the cerebrum (the cerebral cortex), other organs, or a plant.
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