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any sulphide of a metal containing divalent anions in which there are chains of sulphur atoms, as in the polysulphides of sodium, Na2S2, Na2S3, Na2S4, etc


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  • Polysuspensoid

    [pol-ee-suh-spen-soid] /ˌpɒl i səˈspɛn sɔɪd/ noun, Physical Chemistry. 1. a in which the solid particles are polydisperse.

  • Polysyllabic

    [pol-ee-si-lab-ik] /ˌpɒl i sɪˈlæb ɪk/ adjective 1. consisting of several, especially four or more, syllables, as a word. 2. characterized by such words, as a language, piece of writing, etc. /ˌpɒlɪsɪˈlæbɪk/ adjective 1. consisting of more than two syllables adj. 1650s (implied in polysyllabical), from Medieval Latin polysyllabicus, from Greek polysyllabikos; see poly- + syllabic.

  • Polysyllable

    [pol-ee-sil-uh-buh l, pol-ee-sil-] /ˈpɒl iˌsɪl ə bəl, ˌpɒl iˈsɪl-/ noun 1. a word. /ˈpɒlɪˌsɪləbəl/ noun 1. a word consisting of more than two syllables n. 1560s; see poly- + syllable. As a rule, a word of more than three syllables.

  • Polysyllogism

    [pol-ee-sil-uh-jiz-uh m] /ˌpɒl iˈsɪl əˌdʒɪz əm/ noun, Logic. 1. an argument made up of a chain of , the conclusion of each being a premise of the one following, until the last one. /ˌpɒlɪˈsɪləˌdʒɪzəm/ noun 1. a chain of syllogisms in which the conclusion of one syllogism serves as a premise for the next

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