Sub`stan·ti'val adjective Of or pertaining to a substantive; of the nature of substantive. -- Sub`stan*ti'val*ly , adverb Found on http://www.encyclo.co.uk/webster/S/228
adjective of or relating to or having the nature or function of a substantive (i.e. a noun or noun equivalent); `a substantival constituent` Found on https://www.encyclo.co.uk/local/20974