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单词 pearlite
释义

WordReference Random House Unabridged Dictionary of American English © 2024
pearl•ite  (pûr′līt),USA pronunciation n. 
  1. [Metall.]a microscopic lamellar structure found in iron or steel, composed of alternating layers of ferrite and cementite.
  2. [Petrog.]perlite.
  • 1885–90; pearl1 + -ite1
pearl•it•ic  (pûr lit′ik),USA pronunciation adj. 
WordReference Random House Unabridged Dictionary of American English © 2024
per•lite  (pûr′līt),USA pronunciation n. [Petrog.]
  1. Rocksa volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium.
Also, pearlite. 
  • French; see pearl1, -ite1
  • 1825–35;
per•lit•ic  (pûr lit′ik),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
perlite, pearlite /ˈpɜːlaɪt/ n
  1. a variety of obsidian consisting of masses of small pearly globules: used as a filler, insulator, and soil conditioner
Etymology: 19th Century: from French, from perle pearl1
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