(Cf.

Mr.Alfred Sidgwick's _Distinction and the Criticism of Beliefs_, chap.

xiv.) Thus words are classified as Categorematic or Syncategorematic.

A word is Categorematic if used singly as a term without the support of other words: it is Syncategorematic when joined with other words in order to constitute the subject or predicate of a proposition.

If we say _Venus is a planet whose orbit is inside the Earth's_, the subject, 'Venus,' is a word used categorematically as a simple term; the predicate is a composite term whose constituent words (whether substantive, relative, verb, or preposition) are used syncategorematically.
Prepositions, conjunctions, articles, adverbs, relative pronouns, in their ordinary use, can only enter into terms along with other words having a substantive, adjectival or participial force; but when they are themselves the things spoken of and are used substantively (_suppositio materialis_), they are categorematic.