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 elastic bitumen 添加此单词到默认生词本
【化】 矿质橡胶




    Elastic \E*las"tic\ ([-e]*l[a^]s"t[i^]k), a. [Formed fr. Gr.
    'elay`nein to drive; prob. akin to L. alacer lively, brisk,
    and E. alacrity: cf. F. ['e]lastique.]
    1. Springing back; having a power or inherent property of
    returning to the form from which a substance is bent,
    drawn, pressed, or twisted; springy; having the power of
    rebounding; as, a bow is elastic; the air is elastic;
    India rubber is elastic.

    Capable of being drawn out by force like a piece of
    elastic gum, and by its own elasticity returning,
    when the force is removed, to its former position.
    --Paley.

    2. Able to return quickly to a former state or condition,
    after being depressed or overtaxed; having power to
    recover easily from shocks and trials; as, elastic
    spirits; an elastic constitution.

    {Elastic bitumen}. (Min.) See {Elaterite}.

    {Elastic curve}.
    (a) (Geom.) The curve made by a thin elastic rod fixed
    horizontally at one end and loaded at the other.
    (b) (Mech.) The figure assumed by the longitudinal axis of
    an originally straight bar under any system of bending
    forces. --Rankine.

    {Elastic fluids}, those which have the property of expanding
    in all directions on the removal of external pressure, as
    the air, steam, and other gases and vapors.

    {Elastic limit} (Mech.), the limit of distortion, by bending,
    stretching, etc., that a body can undergo and yet return
    to its original form when relieved from stress; also, the
    unit force or stress required to produce this distortion.
    Within the elastic limit the distortion is directly
    proportional to the stress producing it.

    {Elastic tissue} (Anat.), a variety of connective tissue
    consisting of a network of slender and very elastic fibers
    which are but slightly affected by acids or alkalies.

    {Gum elastic}, caoutchouc.

    Elaterite \El"a*ter*ite\, n. (Min.)
    A mineral resin, of a blackish brown color, occurring in
    soft, flexible masses; -- called also {mineral caoutchouc},
    and {elastic bitumen}.

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