ack-ack gun

Từ điển WordNet v3.1 - WordNet Dictionary

noun

artillery designed to shoot upward at airplanes
• Syn:
antiaircraft, antiaircraft gun, flak, flack, pom-pom, ack-ack
• Derivationally related forms:
antiaircraft (for: antiaircraft)
• Hypernyms:
gun
• Hyponyms:
Bofors gun
• Part Meronyms:
predictor