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[per-uh-sahrk] /ˈpɛr əˌsɑrk/

noun, Zoology.
the horny or chitinous outer case or covering protecting the soft parts of hydrozoans.
the outer chitinous layer secreted by colonial hydrozoan coelenterates, such as species of Obelia


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    [per-uh-skohp] /ˈpɛr əˌskoʊp/ noun 1. an optical instrument for viewing objects that are above the level of direct sight or in an otherwise obstructed field of vision, consisting essentially of a tube with an arrangement of prisms or mirrors and, usually, lenses: used especially in submarines. 2. a periscopic lens. /ˈpɛrɪˌskəʊp/ noun 1. any of […]

  • Periscopic

    [per-uh-skop-ik] /ˌpɛr əˈskɒp ɪk/ adjective 1. Optics. (of certain lenses in special microscopes, cameras, etc.) giving distinct vision obliquely, or all around, as well as, or instead of, in a direct line. 2. pertaining to periscopes or their use. /ˌpɛrɪˈskɒpɪk/ adjective 1. (of a lens) having a wide field of view periscopic per·i·scop·ic (pěr’ĭ-skŏp’ĭk) adj. […]

  • Perish

    [per-ish] /ˈpɛr ɪʃ/ verb (used without object) 1. to die or be destroyed through violence, privation, etc.: to perish in an earthquake. 2. to pass away or disappear: an age of elegance that has forever perished. 3. to suffer destruction or ruin: His valuable paintings perished in the fire. 4. to suffer spiritual death: Save […]

  • Perishability

    [per-i-shuh-buh l] /ˈpɛr ɪ ʃə bəl/ adjective 1. subject to decay, ruin, or destruction: perishable fruits and vegetables. noun 2. Usually, perishables. something perishable, especially food. /ˈpɛrɪʃəbəl/ adjective 1. liable to rot or wither noun 2. (often pl) a perishable article, esp food adj. late 15c., perysabyl, from Middle French périssable, and later (in modern […]

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