单词	pyroxene
释义	pyroxene noun py·​rox·​ene pī-ˈräk-ˌsēn  pə- : any of a group of igneous-rock-forming silicate minerals that contain calcium, sodium, magnesium, iron, or aluminum, usually occur in short prismatic crystals or massive form, are often laminated, and vary in color from white to dark green or black pyroxenic ˌpī-ˌräk-ˈsē-nik  pə- -ˈse-  adjective pyroxenoid pī-ˈräk-sə-ˌnȯid  pə- adjective or noun Example Sentences Recent Examples on the Web Maaz, which is on top and thus probably younger, has a composition similar to most basaltic lava flows — full of minerals known as pyroxene and plagioclase but with little or no olivine. New York Times, 27 Apr. 2022 The analysis revealed large olivine crystals surrounded by pyroxene crystals, both of which pointed to the fact that the rock came from volcanic lava flows. Ashley Strickland, CNN, 15 Dec. 2021 Basaltic lava has a low silica content and is composed predominantly of plagioclase, amphibole, and pyroxene. David Bressan, Forbes, 18 May 2021 The upper mantle is composed of silicates common in magmatic and metamorphic rocks, like olivine, pyroxene, and garnet. David Bressan, Forbes, 4 Mar. 2021 Made of minerals such as olivine and pyroxene, and sometimes glass, chondrules themselves come in a variety of shapes, sizes and compositions—often containing a glittering array of crystals. Jonathan O'callaghan, Scientific American, 8 Dec. 2020 Driving around Von Kármán, the Yutu-2 rover found material that, according to its spectrometer, looked to contain at least two minerals: low-calcium pyroxene and olivine. National Geographic, 15 May 2019 Models and some recent finds suggest the upper zones of the mantle are composed of the minerals pyroxene and olivine. National Geographic, 3 July 2019 The water content of minerals like pyroxene, known to be incredibly dry, were oddly wet in Bermuda’s core samples. Robin George Andrews, National Geographic, 17 May 2019 See More Word History Etymology French pyroxène, from Greek pyr- + xenos stranger First Known Use 1800, in the meaning defined above
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