| 释义 |
achondrite Min.|æˈkɒndraɪt|
[f. a- 14 + chondrite 2.]
A meteorite containing no chondrules.
1904Proc. Amer. Philos. Soc. XLIII. 232 Achondrites. Stones poor in Nickel-iron, essentially without round chondrules. 1944C. Palache et al. Dana's Syst. Min. I. 121 The stony meteorites without chondri, named achrondrites, show porphyritic, ophitic, and granular textures resembling those found in some terrestrial rocks. 1957Encycl. Brit. XV. 338/1 The comparatively few chondrule-free stone meteorites are called achondrites.
Add: Hence achonˈdritic a.
1920A. Holmes Nomencl. Petrol. 119 Howardite, an achondritic meteorite. 1965Science 19 Feb. 858 The K/Rb ratios for both chondritic and achondritic meteorites..are also shown in Fig. 2. 1989Nature 11 May 127/1 IDP pyroxene data differ greatly from achondritic pyroxenes because major and minor elements do not display correlations like those seen in, for example, Pasamonte or Shergotty pyroxenes. |