Meaning of spring bow in English:

spring bow

Pronunciation /ˈsprɪŋ ˌbaʊ/

noun

  • 1A concealed bow and arrow serving as an animal trap and equipped with a mechanism to fire the arrow when a tripwire or the like is moved.

  • 2A compass in which the legs are joined by a flexible bow-shaped bar or plate rather than a hinge. Compare "bow-compass". More fully "spring bow dividers".

Origin

Mid 18th century (in an earlier sense). Partly from spring + bow.