Definition of foxtails:
(n) :
A dry spikelet or spikelet seed and flower cluster of some grasses.
(n) :
Any of various grasses having bushy seed spikelets that resemble the tail of a fox
(n) :
species of genus Alopecurus (foxtail grasses).
(n) :
species of Setaria (foxtail millets).
(n) :
Bromus madritensis (foxtail brome).
(n) :
Hordeum jubatum (foxtail barley).