the point at which a spacecraft launched from earth into a lunar orbit is nearest the moon Compare perilune, apocynthion


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    [per-uh-sahy-kuh l] /ˈpɛr əˌsaɪ kəl/ noun, Botany. 1. the outermost cell layer of the stele in a plant, frequently becoming a multilayered zone. /ˈpɛrɪˌsaɪkəl/ noun 1. a layer of plant tissue beneath the endodermis: surrounds the conducting tissue in roots and certain stems pericycle (pěr’ĭ-sī’kəl) A layer of nonvascular tissue that surrounds the vascular tissues […]

  • Period

    [peer-ee-uh d] /ˈpɪər i əd/ noun 1. a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany. 2. any specified division or portion […]

  • Periodate

    [puh-rahy-uh-deyt] /pəˈraɪ əˌdeɪt/ noun, Chemistry. 1. a salt of a , as sodium periodate, Na 2 H 3 IO 6 . /pɜːˈraɪəˌdeɪt/ noun 1. any salt or ester of a periodic acid

  • Period drama

    noun 1. a drama set in a particular historical period

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