[pahy-ruh-klas-tik] /ˌpaɪ rəˈklæs tɪk/

adjective, Geology.
composed chiefly of fragments of volcanic origin, as agglomerate, tuff, and certain other rocks; volcaniclastic.
(of rocks) formed from the solid fragments ejected during a volcanic eruption

1887, from pyro- + clastic.
Composed chiefly of rock fragments of explosive origin, especially those associated with explosive volcanic eruptions. Volcanic ash, obsidian, and pumice are examples of pyroclastic materials.


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    [pahy-ruh-kon-duhk-tiv-i-tee] /ˌpaɪ rəˌkɒn dʌkˈtɪv ɪ ti/ noun, Electricity. 1. brought about by the application of heat, especially in solids that are not conductors at normal temperatures. /ˌpaɪrəʊˌkɒndʌkˈtɪvɪtɪ/ noun 1. conductivity that can be induced in certain solids by heating them

  • Pyrocrystalline

    [pahy-ruh-kris-tl-in, -ahyn, -een] /ˌpaɪ rəˈkrɪs tl ɪn, -ˌaɪn, -ˌin/ adjective, Petrography. 1. crystallized from a molten magma or highly heated solution.

  • Pyroelectric

    [pahy-roh-i-lek-trik] /ˌpaɪ roʊ ɪˈlɛk trɪk/ adjective 1. pertaining to, subject to, or manifesting . noun 2. a substance manifesting . /ˌpaɪrəʊɪˈlɛktrɪk/ adjective 1. of, concerned with, or exhibiting pyroelectricity noun 2. a pyroelectric substance

  • Pyroelectricity

    [pahy-roh-i-lek-tris-i-tee, -ee-lek-] /ˌpaɪ roʊ ɪ lɛkˈtrɪs ɪ ti, -ˌi lɛk-/ noun 1. electrification or electrical polarity produced in certain crystals by temperature changes. /ˌpaɪrəʊɪlɛkˈtrɪsɪtɪ; -ˌiːlɛk-/ noun 1. the development of opposite charges at the ends of the axis of certain hemihedral crystals, such as tourmaline, as a result of a change in temperature

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