rhachilla

1 definition found

rhachilla - Collaborative International Dictionary of English v.0.48 :

  Rhachilla \Rha*chil"la\, n. [NL., fr. Gr. "ra`chis the spine.]
     (Bot.)
     A branch of inflorescence; the zigzag axis on which the
     florets are arranged in the spikelets of grasses.
     [1913 Webster]