The Collaborative International Dictionary
Metapophysis
Metapophysis \Met`a*poph"y*sis\, n.; pl. Metapophyses. [NL. See Meta-, and Apophysis.] (Anat.) A tubercle projecting from the anterior articular processes of some vertebr[ae]; a mammillary process.
Wiktionary
metapophysis
n. (context anatomy English) A tubercle projecting from the anterior articular processes of some vertebrae; a mammillary process.