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mereology

/ˌmiːrɪˈɒlədʒɪ/
noun
1.
the formal study of the logical properties of the relation of part and whole
Derived Forms
mereological, adjective
Word Origin
C20: via French from Greek meros part + -logy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Contemporary definitions for mereology
noun

Boolean algebra that excludes the null class

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