D defs.my
Entry 1 sense Webster, 1913

Arrow grass

/ăr'-ō grăs/ · Ar·row grass · IPA
01 n. An herbaceous grasslike plant (Triglochin palustre, and other species) with pods opening so as to suggest barbed arrowheads.
  1. 1.
    An herbaceous grasslike plant (Triglochin palustre, and other species) with pods opening so as to suggest barbed arrowheads.(Bot.)