quartz

Từ điển Oxford Advanced Learner 8th

quartz [quartz quartzes] BrE [kwɔːts] NAmE [kwɔːrts] noun uncountable
a hard mineral, often in ↑crystal form, that is used to make very accurate clocks and watches

Word Origin:
mid 18th cent.: from German Quarz, from Polish dialect kwardy, corresponding to Czech tvrdý ‘hard’.

Example Bank:
•The watch runs with a normal quartz movement.

• Từ đồng nghĩa / Synonyms:
  quartz glass, vitreous silica, lechatelierite, crystal