Full Idea
I shall divert the word 'trope' to stand for the abstract particular which is, so to speak, the occurrence of an essence.
Gist of Idea
A 'trope' is an abstract particular, the occurrence of an essence
Source
Donald C. Williams (On the Elements of Being: I [1953], p.115)
Book Reference
'Properties', ed/tr. Mellor,D.H. /Oliver,A [OUP 1997], p.115
A Reaction
Thus tropes entered philosophical discussion. Presumably the precedent for an 'abstract particular' would be a particular occurrence of the number 7.