Hyporhachis
Pronunciation : Hy`po*rha"chis
Part of Speech : n.;
Etymology : [NL., fr. Gr. (Zo?l.)
Definition : Defn: The stem of an aftershaft or hypoptilum. [Written also hyporachis.]
pl. Hyporhachides.
Source : Webster's Unabridged Dictionary, 1913