grooving

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the cutting of spiral grooves on the inside of the barrel of a firearm
• Syn:
rifling
• Derivationally related forms:
groove
• Hypernyms:
formation, shaping

• Từ đồng nghĩa / Synonyms:
  vallecula, rut, channel, furrow