n.1.(Anat.) A lateral and backward-projecting process on the dorsal side of a vertebra.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The hyperapophysis is well expanded, which is typical of the sacral vertebra, but SEKI-20165 has a larger-than-usual flaring.
A divided hyperapophysis is present and moderately developed on the fossils, as on all extant plethodontids.