chert
n.
"flint-like quartz," 1670s, of unknown origin. Apparently "a local term, which has been taken into geological use" [OED].
词汇 | chert |
词根词缀 | Online Etymology Dictionary chert n. "flint-like quartz," 1670s, of unknown origin. Apparently "a local term, which has been taken into geological use" [OED]. |
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