air sock

美 [er sɑːk]英 [eə(r) sɒk]
  • 【体】风向标
air sockair sock

noun

1
a truncated cloth cone mounted on a mast;used (e.g., at airports) to show the direction of the wind
Synonym: windsock wind sock sock air-sleeve wind sleeve wind cone drogue

数据来源:WordNet