+ syntax. <span class="searchmatch">protosyntax</span> (uncountable) That part of syntax that omits membership. For quotations using this term, see Citations:<span class="searchmatch">protosyntax</span>. protosyntactical...
From proto- + syntactic. protosyntactic (not comparable) Of or pertaining to <span class="searchmatch">protosyntax</span>....
From proto- + syntactical. protosyntactical (not comparable) of, or relating to <span class="searchmatch">protosyntax</span> able to be defined, but not constructed OED...