Webster’s Revised Unabridged Dictionary · 1913
Prolegomenon
Prol′e·gom′e·non (·nŏn), n.; pl. Prolegomena (#). [ NL., fr. Gr. προλεγόμενον, properly neut. pass. p. pr. of προλέγειν to say beforehand; πρό before + λέγειν to say.] A preliminary remark or observation; an introductory discourse prefixed to a book or treatise. D. Stokes. Sir W. Scott.