parity

noun9

1. •
   Equality; comparability of strength or intensity.

   • Altogether, Microsoft claims a 99% feature parity between 32-bit and 64-bit editions. — 2000
2. •
   Resemblance; analogy.
3. •
   A set with the property of having all of its elements belonging to one of two disjoint subsets, especially a set of integers split in subsets of even and odd elements.

   • Parity is always preserved in such operations.
4. •
   The classification of an element of a set with parity into one of the two sets.

   • The particles' parities can switch at random.
5. •
   The count of one-valued bits in a value, reduced to even or odd or zero or one.
6. •
   Symmetry of interactions under spatial inversion.
7. •
   The number of delivered pregnancies reaching viable gestational age, usually between 20-28 weeks.
8. •
   The number of times a sow has farrowed.
9. •
   In reversi, the last move within a given sector of the board.