squirreltail \ˈ ̷ ̷( ̷ ̷)ˌ ̷ ̷\noun Etymology:squirrel (I) + tail 1.: a tufted perennial grass (Sitanion hystrix) that has very bristly spikes disarticulating above each node and resembles lyme grass 2.alsosquirreltail grassorsquirreltail barley: any of several grasses of the genus Hordeum (as wall barley) with bushy spikes