Hyporhachis

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hyporhachis \Hy`po*rha"chis\, n.; pl. {Hyporhachides}. [NL., fr.
     Gr. "ypo` beneath + ? spine.] (Zool.)
     The stem of an aftershaft or hypoptilum. [Written also
     {hyporachis}.]
     [1913 Webster]