air sock

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

drogue, sock, visual signal, wind cone, wind sleeve, windsock