Definition of suppositio materialis in US English:

suppositio materialis

noun

Logic Linguistics
  • The physical form of a word, word element, or series of words independent of semantic content or grammatical function; reference to a word, etc. in this aspect as an example or model.

Origin

Mid 19th century; earliest use found in John Stuart Mill (1806–1873), philosopher, economist, and advocate of women's rights. From post-classical Latin suppositio materialis from classical Latin suppositiō + post-classical Latin materialis.