Fine-grained black stone (typically a type of chert) upon which objects made of gold or silver can be rubbed to determine their purity; a piece of…
| 单词 | θ214858 |
| 释义 | society > occupation and work > materials > raw material > stone or rock > [noun] > marble > black (4) touch1423 Fine-grained black stone (typically a type of chert) upon which objects made of gold or silver can be rubbed to determine their purity; a piece of… jetc1440 Black marble. Obsolete. touchstone1482 Fine-grained dark stone used for building and monumental work; esp. a type of black marble. Cf. touch, n. 4. Now historical. toucha1509 Fine-grained dark stone used in building and monumental work, esp. black marble; = touchstone, n. 1. |
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