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    Testa

    /ˈtɛstə/

    Meaning & Definition

    noun
    The outer seed coat of a seed, especially in botany.
    The testa of the seed protects the embryo from environmental hazards.
    A protective outer layer or covering of an organism or structure.
    The insect's testa provides a tough shield against predators.
    In certain fruits, the hard outer layer surrounding the seed.
    When you crack open the walnut, you see the hard testa encasing the nut.

    Etymology

    Latin, meaning 'outer shell or covering'.

    Common Phrases and Expressions

    testa intacta:
    the seed coat remains unbroken.
    breaking the testa:
    referring to the process of exposing the seed within.
    testa thickness:
    the measure of the seed coat's robustness.

    Related Words

    seed
    the reproductive structure of a flowering plant.
    embryo
    the early developmental stage of a seed.
    fruit
    the mature ovary of a flowering plant, usually containing seeds.

    Slang Meanings

    A term used in specific gardening circles to refer to a tightly held belief.
    He had a testa mentality about growing heirloom tomatoes.
    An informal term among botanists for a protective layer in discussions.
    We need to consider the testa when discussing seed viability.