parthood en · NOUN
Etymology
Etymology tree Old French partirbor. Middle English parten English part Proto-Indo-European *keyt-der. Proto-Germanic *haiduzder. Proto-West Germanic *-haiduder. Old English -hād Middle English -hede English -hood English parthood From part + -hood.
Meanings
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(uncountable) The relational quality of being a part.
For describing changes in parthood relations over time some sort of temporal apparatus needs to be incorporated into the mereology.
2008 February 1, Maureen Donnelly, Thomas Bittner, “Summation relations and portions of stuff”, in Philosophical Studies, volume 143, number 2, →DOI, pages 167–185: