thumbtack

Từ điển Oxford Advanced Learner 8th

thumb·tack [thumbtack thumbtacks] BrE [ˈθʌmtæk] NAmE [ˈθʌmtæk] (also tack) (both NAmE) (BrE ˈdrawing pin) noun
a short pin with a large round flat head, used especially for fastening paper to a board or wall
See also: ↑drawing pin ▪ ↑tack

• Từ đồng nghĩa / Synonyms:
  drawing pin, pushpin